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Finding the Fourth Proportional to 291,120.80, 436,417.20 and 104,088.80

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Solution

The fourth proportional to 291,120.80, 436,417.20 and 104,088.80 is: 156,038.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,120.80 : 436,417.20 = 104,088.80 : x
  2. Step 2: Convert to fraction form
    291,120.80/436,417.20 = 104,088.80/x
  3. Step 3: Cross multiply
    291,120.80x = 436,417.20 × 104,088.80
  4. Step 4: Simplify right side
    291,120.80x = 45,426,142,647.36
  5. Step 5: Solve for x
    x = 45,426,142,647.36/291,120.80
  6. Step 6: Final answer
    x = 156,038.81

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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.