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Finding the Fourth Proportional to 124,798.71, 172,202.31 and 71,084.79

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Solution

The fourth proportional to 124,798.71, 172,202.31 and 71,084.79 is: 98,085.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,798.71 : 172,202.31 = 71,084.79 : x
  2. Step 2: Convert to fraction form
    124,798.71/172,202.31 = 71,084.79/x
  3. Step 3: Cross multiply
    124,798.71x = 172,202.31 × 71,084.79
  4. Step 4: Simplify right side
    124,798.71x = 12,240,965,043.86
  5. Step 5: Solve for x
    x = 12,240,965,043.86/124,798.71
  6. Step 6: Final answer
    x = 98,085.67

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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.