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Finding the Fourth Proportional to 87,641.67, 131,478.84 and 28,461.45

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Solution

The fourth proportional to 87,641.67, 131,478.84 and 28,461.45 is: 42,697.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,641.67 : 131,478.84 = 28,461.45 : x
  2. Step 2: Convert to fraction form
    87,641.67/131,478.84 = 28,461.45/x
  3. Step 3: Cross multiply
    87,641.67x = 131,478.84 × 28,461.45
  4. Step 4: Simplify right side
    87,641.67x = 3,742,078,430.72
  5. Step 5: Solve for x
    x = 3,742,078,430.72/87,641.67
  6. Step 6: Final answer
    x = 42,697.48

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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.