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Finding the Fourth Proportional to 65,248.56, 90,080.32 and 42,957.36

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Solution

The fourth proportional to 65,248.56, 90,080.32 and 42,957.36 is: 59,305.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,248.56 : 90,080.32 = 42,957.36 : x
  2. Step 2: Convert to fraction form
    65,248.56/90,080.32 = 42,957.36/x
  3. Step 3: Cross multiply
    65,248.56x = 90,080.32 × 42,957.36
  4. Step 4: Simplify right side
    65,248.56x = 3,869,612,735.16
  5. Step 5: Solve for x
    x = 3,869,612,735.16/65,248.56
  6. Step 6: Final answer
    x = 59,305.72

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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.