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Finding the Fourth Proportional to 91,735.70, 137,603.55 and 56,743.70

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Solution

The fourth proportional to 91,735.70, 137,603.55 and 56,743.70 is: 85,115.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,735.70 : 137,603.55 = 56,743.70 : x
  2. Step 2: Convert to fraction form
    91,735.70/137,603.55 = 56,743.70/x
  3. Step 3: Cross multiply
    91,735.70x = 137,603.55 × 56,743.70
  4. Step 4: Simplify right side
    91,735.70x = 7,808,134,560.14
  5. Step 5: Solve for x
    x = 7,808,134,560.14/91,735.70
  6. Step 6: Final answer
    x = 85,115.55

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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.