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Finding the Fourth Proportional to 315,611.16, 435,545.82 and 172,368.60

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Solution

The fourth proportional to 315,611.16, 435,545.82 and 172,368.60 is: 237,869.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,611.16 : 435,545.82 = 172,368.60 : x
  2. Step 2: Convert to fraction form
    315,611.16/435,545.82 = 172,368.60/x
  3. Step 3: Cross multiply
    315,611.16x = 435,545.82 × 172,368.60
  4. Step 4: Simplify right side
    315,611.16x = 75,074,423,229.25
  5. Step 5: Solve for x
    x = 75,074,423,229.25/315,611.16
  6. Step 6: Final answer
    x = 237,869.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.