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Finding the Fourth Proportional to 55,615.60, 76,729.98 and 38,615.32

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Solution

The fourth proportional to 55,615.60, 76,729.98 and 38,615.32 is: 53,275.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,615.60 : 76,729.98 = 38,615.32 : x
  2. Step 2: Convert to fraction form
    55,615.60/76,729.98 = 38,615.32/x
  3. Step 3: Cross multiply
    55,615.60x = 76,729.98 × 38,615.32
  4. Step 4: Simplify right side
    55,615.60x = 2,962,952,731.29
  5. Step 5: Solve for x
    x = 2,962,952,731.29/55,615.60
  6. Step 6: Final answer
    x = 53,275.57

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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.