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Finding the Fourth Proportional to 124,428.96, 171,711.70 and 67,840.34

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Solution

The fourth proportional to 124,428.96, 171,711.70 and 67,840.34 is: 93,619.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,428.96 : 171,711.70 = 67,840.34 : x
  2. Step 2: Convert to fraction form
    124,428.96/171,711.70 = 67,840.34/x
  3. Step 3: Cross multiply
    124,428.96x = 171,711.70 × 67,840.34
  4. Step 4: Simplify right side
    124,428.96x = 11,648,979,081.82
  5. Step 5: Solve for x
    x = 11,648,979,081.82/124,428.96
  6. Step 6: Final answer
    x = 93,619.52

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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.