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Finding the Fourth Proportional to 85,498.71, 128,274 and 60,586.95

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Solution

The fourth proportional to 85,498.71, 128,274 and 60,586.95 is: 90,898.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,498.71 : 128,274 = 60,586.95 : x
  2. Step 2: Convert to fraction form
    85,498.71/128,274 = 60,586.95/x
  3. Step 3: Cross multiply
    85,498.71x = 128,274 × 60,586.95
  4. Step 4: Simplify right side
    85,498.71x = 7,771,730,424.30
  5. Step 5: Solve for x
    x = 7,771,730,424.30/85,498.71
  6. Step 6: Final answer
    x = 90,898.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.