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Finding the Fourth Proportional to 261,036.90, 391,555.35 and 178,092.90

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Solution

The fourth proportional to 261,036.90, 391,555.35 and 178,092.90 is: 267,139.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,036.90 : 391,555.35 = 178,092.90 : x
  2. Step 2: Convert to fraction form
    261,036.90/391,555.35 = 178,092.90/x
  3. Step 3: Cross multiply
    261,036.90x = 391,555.35 × 178,092.90
  4. Step 4: Simplify right side
    261,036.90x = 69,733,227,792.02
  5. Step 5: Solve for x
    x = 69,733,227,792.02/261,036.90
  6. Step 6: Final answer
    x = 267,139.35

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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.