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Finding the Fourth Proportional to 124,431.79, 171,730.45 and 70,724.88

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Solution

The fourth proportional to 124,431.79, 171,730.45 and 70,724.88 is: 97,608.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,431.79 : 171,730.45 = 70,724.88 : x
  2. Step 2: Convert to fraction form
    124,431.79/171,730.45 = 70,724.88/x
  3. Step 3: Cross multiply
    124,431.79x = 171,730.45 × 70,724.88
  4. Step 4: Simplify right side
    124,431.79x = 12,145,616,068.43
  5. Step 5: Solve for x
    x = 12,145,616,068.43/124,431.79
  6. Step 6: Final answer
    x = 97,608.62

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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.