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Finding the Fourth Proportional to 91,415.70, 137,123.55 and 75,863.70

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Solution

The fourth proportional to 91,415.70, 137,123.55 and 75,863.70 is: 113,795.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,415.70 : 137,123.55 = 75,863.70 : x
  2. Step 2: Convert to fraction form
    91,415.70/137,123.55 = 75,863.70/x
  3. Step 3: Cross multiply
    91,415.70x = 137,123.55 × 75,863.70
  4. Step 4: Simplify right side
    91,415.70x = 10,402,699,860.14
  5. Step 5: Solve for x
    x = 10,402,699,860.14/91,415.70
  6. Step 6: Final answer
    x = 113,795.55

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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.