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Finding the Fourth Proportional to 91,637.80, 137,478.22 and 28,454.66

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Solution

The fourth proportional to 91,637.80, 137,478.22 and 28,454.66 is: 42,688.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,637.80 : 137,478.22 = 28,454.66 : x
  2. Step 2: Convert to fraction form
    91,637.80/137,478.22 = 28,454.66/x
  3. Step 3: Cross multiply
    91,637.80x = 137,478.22 × 28,454.66
  4. Step 4: Simplify right side
    91,637.80x = 3,911,895,764.52
  5. Step 5: Solve for x
    x = 3,911,895,764.52/91,637.80
  6. Step 6: Final answer
    x = 42,688.67

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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.