Home / 81,520.48-112,502.88-45,708.76

Finding the Fourth Proportional to 81,520.48, 112,502.88 and 45,708.76

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Solution

The fourth proportional to 81,520.48, 112,502.88 and 45,708.76 is: 63,080.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,520.48 : 112,502.88 = 45,708.76 : x
  2. Step 2: Convert to fraction form
    81,520.48/112,502.88 = 45,708.76/x
  3. Step 3: Cross multiply
    81,520.48x = 112,502.88 × 45,708.76
  4. Step 4: Simplify right side
    81,520.48x = 5,142,367,141.23
  5. Step 5: Solve for x
    x = 5,142,367,141.23/81,520.48
  6. Step 6: Final answer
    x = 63,080.68

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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.