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Finding the Fourth Proportional to 261,798.60, 392,892.30 and 104,140.20

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Solution

The fourth proportional to 261,798.60, 392,892.30 and 104,140.20 is: 156,287.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,798.60 : 392,892.30 = 104,140.20 : x
  2. Step 2: Convert to fraction form
    261,798.60/392,892.30 = 104,140.20/x
  3. Step 3: Cross multiply
    261,798.60x = 392,892.30 × 104,140.20
  4. Step 4: Simplify right side
    261,798.60x = 40,915,882,700.46
  5. Step 5: Solve for x
    x = 40,915,882,700.46/261,798.60
  6. Step 6: Final answer
    x = 156,287.63

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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.