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Finding the Fourth Proportional to 91,613,648.40, 137,420,472.60 and 87,134,672.40

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Solution

The fourth proportional to 91,613,648.40, 137,420,472.60 and 87,134,672.40 is: 130,702,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,613,648.40 : 137,420,472.60 = 87,134,672.40 : x
  2. Step 2: Convert to fraction form
    91,613,648.40/137,420,472.60 = 87,134,672.40/x
  3. Step 3: Cross multiply
    91,613,648.40x = 137,420,472.60 × 87,134,672.40
  4. Step 4: Simplify right side
    91,613,648.40x = 11,974,087,861,054,176
  5. Step 5: Solve for x
    x = 11,974,087,861,054,176/91,613,648.40
  6. Step 6: Final answer
    x = 130,702,008.60

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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.