Home / 210,006.30-315,009.45-121,432.80

Finding the Fourth Proportional to 210,006.30, 315,009.45 and 121,432.80

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Solution

The fourth proportional to 210,006.30, 315,009.45 and 121,432.80 is: 182,149.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,006.30 : 315,009.45 = 121,432.80 : x
  2. Step 2: Convert to fraction form
    210,006.30/315,009.45 = 121,432.80/x
  3. Step 3: Cross multiply
    210,006.30x = 315,009.45 × 121,432.80
  4. Step 4: Simplify right side
    210,006.30x = 38,252,479,539.96
  5. Step 5: Solve for x
    x = 38,252,479,539.96/210,006.30
  6. Step 6: Final answer
    x = 182,149.20

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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.