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Finding the Fourth Proportional to 91,503.20, 137,259.70 and 28,366.94

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Solution

The fourth proportional to 91,503.20, 137,259.70 and 28,366.94 is: 42,551.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,503.20 : 137,259.70 = 28,366.94 : x
  2. Step 2: Convert to fraction form
    91,503.20/137,259.70 = 28,366.94/x
  3. Step 3: Cross multiply
    91,503.20x = 137,259.70 × 28,366.94
  4. Step 4: Simplify right side
    91,503.20x = 3,893,637,946.55
  5. Step 5: Solve for x
    x = 3,893,637,946.55/91,503.20
  6. Step 6: Final answer
    x = 42,551.93

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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.