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Finding the Fourth Proportional to 261,617.10, 392,425.65 and 103,764.30

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Solution

The fourth proportional to 261,617.10, 392,425.65 and 103,764.30 is: 155,646.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,617.10 : 392,425.65 = 103,764.30 : x
  2. Step 2: Convert to fraction form
    261,617.10/392,425.65 = 103,764.30/x
  3. Step 3: Cross multiply
    261,617.10x = 392,425.65 × 103,764.30
  4. Step 4: Simplify right side
    261,617.10x = 40,719,772,874.30
  5. Step 5: Solve for x
    x = 40,719,772,874.30/261,617.10
  6. Step 6: Final answer
    x = 155,646.45

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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.