Home / 318,539.40-477,975.10-129,139.74

Finding the Fourth Proportional to 318,539.40, 477,975.10 and 129,139.74

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Solution

The fourth proportional to 318,539.40, 477,975.10 and 129,139.74 is: 193,776.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,539.40 : 477,975.10 = 129,139.74 : x
  2. Step 2: Convert to fraction form
    318,539.40/477,975.10 = 129,139.74/x
  3. Step 3: Cross multiply
    318,539.40x = 477,975.10 × 129,139.74
  4. Step 4: Simplify right side
    318,539.40x = 61,725,580,140.47
  5. Step 5: Solve for x
    x = 61,725,580,140.47/318,539.40
  6. Step 6: Final answer
    x = 193,776.91

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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.