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Finding the Fourth Proportional to 70,154.52, 105,063.66 and 51,128.16

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Solution

The fourth proportional to 70,154.52, 105,063.66 and 51,128.16 is: 76,569.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,154.52 : 105,063.66 = 51,128.16 : x
  2. Step 2: Convert to fraction form
    70,154.52/105,063.66 = 51,128.16/x
  3. Step 3: Cross multiply
    70,154.52x = 105,063.66 × 51,128.16
  4. Step 4: Simplify right side
    70,154.52x = 5,371,711,618.67
  5. Step 5: Solve for x
    x = 5,371,711,618.67/70,154.52
  6. Step 6: Final answer
    x = 76,569.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.