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Finding the Fourth Proportional to 238,897.80, 358,402.12 and 81,126.40

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Solution

The fourth proportional to 238,897.80, 358,402.12 and 81,126.40 is: 121,708.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,897.80 : 358,402.12 = 81,126.40 : x
  2. Step 2: Convert to fraction form
    238,897.80/358,402.12 = 81,126.40/x
  3. Step 3: Cross multiply
    238,897.80x = 358,402.12 × 81,126.40
  4. Step 4: Simplify right side
    238,897.80x = 29,075,873,747.97
  5. Step 5: Solve for x
    x = 29,075,873,747.97/238,897.80
  6. Step 6: Final answer
    x = 121,708.42

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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.