Home / 81,123.16-121,691.96-28,533.12

Finding the Fourth Proportional to 81,123.16, 121,691.96 and 28,533.12

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Solution

The fourth proportional to 81,123.16, 121,691.96 and 28,533.12 is: 42,802.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,123.16 : 121,691.96 = 28,533.12 : x
  2. Step 2: Convert to fraction form
    81,123.16/121,691.96 = 28,533.12/x
  3. Step 3: Cross multiply
    81,123.16x = 121,691.96 × 28,533.12
  4. Step 4: Simplify right side
    81,123.16x = 3,472,251,297.72
  5. Step 5: Solve for x
    x = 3,472,251,297.72/81,123.16
  6. Step 6: Final answer
    x = 42,802.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.