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Finding the Fourth Proportional to 326,607.32, 489,836.40 and 89,970.68

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Solution

The fourth proportional to 326,607.32, 489,836.40 and 89,970.68 is: 134,935.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,607.32 : 489,836.40 = 89,970.68 : x
  2. Step 2: Convert to fraction form
    326,607.32/489,836.40 = 89,970.68/x
  3. Step 3: Cross multiply
    326,607.32x = 489,836.40 × 89,970.68
  4. Step 4: Simplify right side
    326,607.32x = 44,070,913,996.75
  5. Step 5: Solve for x
    x = 44,070,913,996.75/326,607.32
  6. Step 6: Final answer
    x = 134,935.48

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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.