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Finding the Fourth Proportional to 290,098.70, 435,151.04 and 87,696.47

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Solution

The fourth proportional to 290,098.70, 435,151.04 and 87,696.47 is: 131,545.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,098.70 : 435,151.04 = 87,696.47 : x
  2. Step 2: Convert to fraction form
    290,098.70/435,151.04 = 87,696.47/x
  3. Step 3: Cross multiply
    290,098.70x = 435,151.04 × 87,696.47
  4. Step 4: Simplify right side
    290,098.70x = 38,161,207,510.59
  5. Step 5: Solve for x
    x = 38,161,207,510.59/290,098.70
  6. Step 6: Final answer
    x = 131,545.60

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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.