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Finding the Fourth Proportional to 81,615.60, 112,615.31 and 45,807.12

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Solution

The fourth proportional to 81,615.60, 112,615.31 and 45,807.12 is: 63,205.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,615.60 : 112,615.31 = 45,807.12 : x
  2. Step 2: Convert to fraction form
    81,615.60/112,615.31 = 45,807.12/x
  3. Step 3: Cross multiply
    81,615.60x = 112,615.31 × 45,807.12
  4. Step 4: Simplify right side
    81,615.60x = 5,158,583,133.53
  5. Step 5: Solve for x
    x = 5,158,583,133.53/81,615.60
  6. Step 6: Final answer
    x = 63,205.85

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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.