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Finding the Fourth Proportional to 66,335.76, 91,478.16 and 56,291.76

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Solution

The fourth proportional to 66,335.76, 91,478.16 and 56,291.76 is: 77,627.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,335.76 : 91,478.16 = 56,291.76 : x
  2. Step 2: Convert to fraction form
    66,335.76/91,478.16 = 56,291.76/x
  3. Step 3: Cross multiply
    66,335.76x = 91,478.16 × 56,291.76
  4. Step 4: Simplify right side
    66,335.76x = 5,149,466,627.96
  5. Step 5: Solve for x
    x = 5,149,466,627.96/66,335.76
  6. Step 6: Final answer
    x = 77,627.31

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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.