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Finding the Fourth Proportional to 65,508.93, 90,374.31 and 42,808.52

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Solution

The fourth proportional to 65,508.93, 90,374.31 and 42,808.52 is: 59,057.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,508.93 : 90,374.31 = 42,808.52 : x
  2. Step 2: Convert to fraction form
    65,508.93/90,374.31 = 42,808.52/x
  3. Step 3: Cross multiply
    65,508.93x = 90,374.31 × 42,808.52
  4. Step 4: Simplify right side
    65,508.93x = 3,868,790,457.12
  5. Step 5: Solve for x
    x = 3,868,790,457.12/65,508.93
  6. Step 6: Final answer
    x = 59,057.45

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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.