Home / 81,487.05-112,456.86-45,688.59

Finding the Fourth Proportional to 81,487.05, 112,456.86 and 45,688.59

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Solution

The fourth proportional to 81,487.05, 112,456.86 and 45,688.59 is: 63,052.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,487.05 : 112,456.86 = 45,688.59 : x
  2. Step 2: Convert to fraction form
    81,487.05/112,456.86 = 45,688.59/x
  3. Step 3: Cross multiply
    81,487.05x = 112,456.86 × 45,688.59
  4. Step 4: Simplify right side
    81,487.05x = 5,137,995,197.90
  5. Step 5: Solve for x
    x = 5,137,995,197.90/81,487.05
  6. Step 6: Final answer
    x = 63,052.91

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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.