Home / 129,012.31-178,030.98-71,655.29

Finding the Fourth Proportional to 129,012.31, 178,030.98 and 71,655.29

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Solution

The fourth proportional to 129,012.31, 178,030.98 and 71,655.29 is: 98,880.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,012.31 : 178,030.98 = 71,655.29 : x
  2. Step 2: Convert to fraction form
    129,012.31/178,030.98 = 71,655.29/x
  3. Step 3: Cross multiply
    129,012.31x = 178,030.98 × 71,655.29
  4. Step 4: Simplify right side
    129,012.31x = 12,756,861,500.88
  5. Step 5: Solve for x
    x = 12,756,861,500.88/129,012.31
  6. Step 6: Final answer
    x = 98,880.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.