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Finding the Fourth Proportional to 338,818.53, 508,225.05 and 86,099.74

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Solution

The fourth proportional to 338,818.53, 508,225.05 and 86,099.74 is: 129,148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,818.53 : 508,225.05 = 86,099.74 : x
  2. Step 2: Convert to fraction form
    338,818.53/508,225.05 = 86,099.74/x
  3. Step 3: Cross multiply
    338,818.53x = 508,225.05 × 86,099.74
  4. Step 4: Simplify right side
    338,818.53x = 43,758,044,666.49
  5. Step 5: Solve for x
    x = 43,758,044,666.49/338,818.53
  6. Step 6: Final answer
    x = 129,148.91

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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.