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Finding the Fourth Proportional to 129,604, 178,853.52 and 69,988

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Solution

The fourth proportional to 129,604, 178,853.52 and 69,988 is: 96,583.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,604 : 178,853.52 = 69,988 : x
  2. Step 2: Convert to fraction form
    129,604/178,853.52 = 69,988/x
  3. Step 3: Cross multiply
    129,604x = 178,853.52 × 69,988
  4. Step 4: Simplify right side
    129,604x = 12,517,600,157.76
  5. Step 5: Solve for x
    x = 12,517,600,157.76/129,604
  6. Step 6: Final answer
    x = 96,583.44

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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.