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Finding the Fourth Proportional to 91,602.54, 137,423.39 and 28,421.28

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Solution

The fourth proportional to 91,602.54, 137,423.39 and 28,421.28 is: 42,637.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,602.54 : 137,423.39 = 28,421.28 : x
  2. Step 2: Convert to fraction form
    91,602.54/137,423.39 = 28,421.28/x
  3. Step 3: Cross multiply
    91,602.54x = 137,423.39 × 28,421.28
  4. Step 4: Simplify right side
    91,602.54x = 3,905,748,503.63
  5. Step 5: Solve for x
    x = 3,905,748,503.63/91,602.54
  6. Step 6: Final answer
    x = 42,637.99

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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.