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Finding the Fourth Proportional to 100,742,430.80, 150,861,703.80 and 80,587,038.80

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Solution

The fourth proportional to 100,742,430.80, 150,861,703.80 and 80,587,038.80 is: 120,679,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,742,430.80 : 150,861,703.80 = 80,587,038.80 : x
  2. Step 2: Convert to fraction form
    100,742,430.80/150,861,703.80 = 80,587,038.80/x
  3. Step 3: Cross multiply
    100,742,430.80x = 150,861,703.80 × 80,587,038.80
  4. Step 4: Simplify right side
    100,742,430.80x = 12,157,497,977,564,708
  5. Step 5: Solve for x
    x = 12,157,497,977,564,708/100,742,430.80
  6. Step 6: Final answer
    x = 120,679,021.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.