Home / 210,122.38-315,132.54-69,862.78

Finding the Fourth Proportional to 210,122.38, 315,132.54 and 69,862.78

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Solution

The fourth proportional to 210,122.38, 315,132.54 and 69,862.78 is: 104,777.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,122.38 : 315,132.54 = 69,862.78 : x
  2. Step 2: Convert to fraction form
    210,122.38/315,132.54 = 69,862.78/x
  3. Step 3: Cross multiply
    210,122.38x = 315,132.54 × 69,862.78
  4. Step 4: Simplify right side
    210,122.38x = 22,016,035,312.86
  5. Step 5: Solve for x
    x = 22,016,035,312.86/210,122.38
  6. Step 6: Final answer
    x = 104,777.20

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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.