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Finding the Fourth Proportional to 82,990.68, 124,529.76 and 36,188.88

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Solution

The fourth proportional to 82,990.68, 124,529.76 and 36,188.88 is: 54,302.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,990.68 : 124,529.76 = 36,188.88 : x
  2. Step 2: Convert to fraction form
    82,990.68/124,529.76 = 36,188.88/x
  3. Step 3: Cross multiply
    82,990.68x = 124,529.76 × 36,188.88
  4. Step 4: Simplify right side
    82,990.68x = 4,506,592,541.07
  5. Step 5: Solve for x
    x = 4,506,592,541.07/82,990.68
  6. Step 6: Final answer
    x = 54,302.39

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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.