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Finding the Fourth Proportional to 261,959.40, 392,939.10 and 156,724.20

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Solution

The fourth proportional to 261,959.40, 392,939.10 and 156,724.20 is: 235,086.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,959.40 : 392,939.10 = 156,724.20 : x
  2. Step 2: Convert to fraction form
    261,959.40/392,939.10 = 156,724.20/x
  3. Step 3: Cross multiply
    261,959.40x = 392,939.10 × 156,724.20
  4. Step 4: Simplify right side
    261,959.40x = 61,583,066,096.22
  5. Step 5: Solve for x
    x = 61,583,066,096.22/261,959.40
  6. Step 6: Final answer
    x = 235,086.30

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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.