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Finding the Fourth Proportional to 61,713.40, 85,304.46 and 56,814.52

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Solution

The fourth proportional to 61,713.40, 85,304.46 and 56,814.52 is: 78,532.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,713.40 : 85,304.46 = 56,814.52 : x
  2. Step 2: Convert to fraction form
    61,713.40/85,304.46 = 56,814.52/x
  3. Step 3: Cross multiply
    61,713.40x = 85,304.46 × 56,814.52
  4. Step 4: Simplify right side
    61,713.40x = 4,846,531,948.76
  5. Step 5: Solve for x
    x = 4,846,531,948.76/61,713.40
  6. Step 6: Final answer
    x = 78,532.89

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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.