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Finding the Fourth Proportional to 129,248.64, 178,148.16 and 88,894.08

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Solution

The fourth proportional to 129,248.64, 178,148.16 and 88,894.08 is: 122,525.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,248.64 : 178,148.16 = 88,894.08 : x
  2. Step 2: Convert to fraction form
    129,248.64/178,148.16 = 88,894.08/x
  3. Step 3: Cross multiply
    129,248.64x = 178,148.16 × 88,894.08
  4. Step 4: Simplify right side
    129,248.64x = 15,836,316,786.89
  5. Step 5: Solve for x
    x = 15,836,316,786.89/129,248.64
  6. Step 6: Final answer
    x = 122,525.98

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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.