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Finding the Fourth Proportional to 129,665.58, 178,938.54 and 70,049.58

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Solution

The fourth proportional to 129,665.58, 178,938.54 and 70,049.58 is: 96,668.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,665.58 : 178,938.54 = 70,049.58 : x
  2. Step 2: Convert to fraction form
    129,665.58/178,938.54 = 70,049.58/x
  3. Step 3: Cross multiply
    129,665.58x = 178,938.54 × 70,049.58
  4. Step 4: Simplify right side
    129,665.58x = 12,534,569,572.81
  5. Step 5: Solve for x
    x = 12,534,569,572.81/129,665.58
  6. Step 6: Final answer
    x = 96,668.44

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1.5x scale

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.