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Finding the Fourth Proportional to 62,685.60, 86,488.88 and 40,342.56

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Solution

The fourth proportional to 62,685.60, 86,488.88 and 40,342.56 is: 55,661.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,685.60 : 86,488.88 = 40,342.56 : x
  2. Step 2: Convert to fraction form
    62,685.60/86,488.88 = 40,342.56/x
  3. Step 3: Cross multiply
    62,685.60x = 86,488.88 × 40,342.56
  4. Step 4: Simplify right side
    62,685.60x = 3,489,182,830.73
  5. Step 5: Solve for x
    x = 3,489,182,830.73/62,685.60
  6. Step 6: Final answer
    x = 55,661.63

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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.