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Finding the Fourth Proportional to 55,874.40, 77,084.82 and 31,988.28

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Solution

The fourth proportional to 55,874.40, 77,084.82 and 31,988.28 is: 44,131.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,874.40 : 77,084.82 = 31,988.28 : x
  2. Step 2: Convert to fraction form
    55,874.40/77,084.82 = 31,988.28/x
  3. Step 3: Cross multiply
    55,874.40x = 77,084.82 × 31,988.28
  4. Step 4: Simplify right side
    55,874.40x = 2,465,810,805.91
  5. Step 5: Solve for x
    x = 2,465,810,805.91/55,874.40
  6. Step 6: Final answer
    x = 44,131.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.