Home / 137,613.12-189,908.28-77,197.20

Finding the Fourth Proportional to 137,613.12, 189,908.28 and 77,197.20

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Solution

The fourth proportional to 137,613.12, 189,908.28 and 77,197.20 is: 106,533.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,613.12 : 189,908.28 = 77,197.20 : x
  2. Step 2: Convert to fraction form
    137,613.12/189,908.28 = 77,197.20/x
  3. Step 3: Cross multiply
    137,613.12x = 189,908.28 × 77,197.20
  4. Step 4: Simplify right side
    137,613.12x = 14,660,387,472.82
  5. Step 5: Solve for x
    x = 14,660,387,472.82/137,613.12
  6. Step 6: Final answer
    x = 106,533.36

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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.