Home / 126,811,332.68-189,943,693.27-85,644,399.20

Finding the Fourth Proportional to 126,811,332.68, 189,943,693.27 and 85,644,399.20

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Solution

The fourth proportional to 126,811,332.68, 189,943,693.27 and 85,644,399.20 is: 128,282,016.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,811,332.68 : 189,943,693.27 = 85,644,399.20 : x
  2. Step 2: Convert to fraction form
    126,811,332.68/189,943,693.27 = 85,644,399.20/x
  3. Step 3: Cross multiply
    126,811,332.68x = 189,943,693.27 × 85,644,399.20
  4. Step 4: Simplify right side
    126,811,332.68x = 16,267,613,490,774,404
  5. Step 5: Solve for x
    x = 16,267,613,490,774,404/126,811,332.68
  6. Step 6: Final answer
    x = 128,282,016.66

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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.