Home / 143,795.08-215,359.98-138,812.68

Finding the Fourth Proportional to 143,795.08, 215,359.98 and 138,812.68

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Solution

The fourth proportional to 143,795.08, 215,359.98 and 138,812.68 is: 207,897.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,795.08 : 215,359.98 = 138,812.68 : x
  2. Step 2: Convert to fraction form
    143,795.08/215,359.98 = 138,812.68/x
  3. Step 3: Cross multiply
    143,795.08x = 215,359.98 × 138,812.68
  4. Step 4: Simplify right side
    143,795.08x = 29,894,695,988.55
  5. Step 5: Solve for x
    x = 29,894,695,988.55/143,795.08
  6. Step 6: Final answer
    x = 207,897.91

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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.