Home / 129,041.46-178,071.18-71,684.50

Finding the Fourth Proportional to 129,041.46, 178,071.18 and 71,684.50

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Solution

The fourth proportional to 129,041.46, 178,071.18 and 71,684.50 is: 98,921.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,041.46 : 178,071.18 = 71,684.50 : x
  2. Step 2: Convert to fraction form
    129,041.46/178,071.18 = 71,684.50/x
  3. Step 3: Cross multiply
    129,041.46x = 178,071.18 × 71,684.50
  4. Step 4: Simplify right side
    129,041.46x = 12,764,943,502.71
  5. Step 5: Solve for x
    x = 12,764,943,502.71/129,041.46
  6. Step 6: Final answer
    x = 98,921.26

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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.