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Finding the Fourth Proportional to 326,700.92, 489,962.88 and 89,987.30

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Solution

The fourth proportional to 326,700.92, 489,962.88 and 89,987.30 is: 134,956.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,700.92 : 489,962.88 = 89,987.30 : x
  2. Step 2: Convert to fraction form
    326,700.92/489,962.88 = 89,987.30/x
  3. Step 3: Cross multiply
    326,700.92x = 489,962.88 × 89,987.30
  4. Step 4: Simplify right side
    326,700.92x = 44,090,436,671.42
  5. Step 5: Solve for x
    x = 44,090,436,671.42/326,700.92
  6. Step 6: Final answer
    x = 134,956.57

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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.