Home / 210,211.20-315,129.31-77,060.38

Finding the Fourth Proportional to 210,211.20, 315,129.31 and 77,060.38

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Solution

The fourth proportional to 210,211.20, 315,129.31 and 77,060.38 is: 115,521.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,211.20 : 315,129.31 = 77,060.38 : x
  2. Step 2: Convert to fraction form
    210,211.20/315,129.31 = 77,060.38/x
  3. Step 3: Cross multiply
    210,211.20x = 315,129.31 × 77,060.38
  4. Step 4: Simplify right side
    210,211.20x = 24,283,984,377.74
  5. Step 5: Solve for x
    x = 24,283,984,377.74/210,211.20
  6. Step 6: Final answer
    x = 115,521.84

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1.5x scale

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.