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Finding the Fourth Proportional to 91,041.80, 136,581.90 and 38,424.20

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Solution

The fourth proportional to 91,041.80, 136,581.90 and 38,424.20 is: 57,644.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,041.80 : 136,581.90 = 38,424.20 : x
  2. Step 2: Convert to fraction form
    91,041.80/136,581.90 = 38,424.20/x
  3. Step 3: Cross multiply
    91,041.80x = 136,581.90 × 38,424.20
  4. Step 4: Simplify right side
    91,041.80x = 5,248,050,241.98
  5. Step 5: Solve for x
    x = 5,248,050,241.98/91,041.80
  6. Step 6: Final answer
    x = 57,644.40

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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.