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Finding the Fourth Proportional to 65,740.92, 90,720.72 and 37,455.72

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Solution

The fourth proportional to 65,740.92, 90,720.72 and 37,455.72 is: 51,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,740.92 : 90,720.72 = 37,455.72 : x
  2. Step 2: Convert to fraction form
    65,740.92/90,720.72 = 37,455.72/x
  3. Step 3: Cross multiply
    65,740.92x = 90,720.72 × 37,455.72
  4. Step 4: Simplify right side
    65,740.92x = 3,398,009,886.52
  5. Step 5: Solve for x
    x = 3,398,009,886.52/65,740.92
  6. Step 6: Final answer
    x = 51,687.90

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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.