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Finding the Fourth Proportional to 129,608.76, 178,860.08 and 69,992.76

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Solution

The fourth proportional to 129,608.76, 178,860.08 and 69,992.76 is: 96,590.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,608.76 : 178,860.08 = 69,992.76 : x
  2. Step 2: Convert to fraction form
    129,608.76/178,860.08 = 69,992.76/x
  3. Step 3: Cross multiply
    129,608.76x = 178,860.08 × 69,992.76
  4. Step 4: Simplify right side
    129,608.76x = 12,518,910,653.02
  5. Step 5: Solve for x
    x = 12,518,910,653.02/129,608.76
  6. Step 6: Final answer
    x = 96,590.00

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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.