Home / 109,621.40-164,432.10-79,732.40

Finding the Fourth Proportional to 109,621.40, 164,432.10 and 79,732.40

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Solution

The fourth proportional to 109,621.40, 164,432.10 and 79,732.40 is: 119,598.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,621.40 : 164,432.10 = 79,732.40 : x
  2. Step 2: Convert to fraction form
    109,621.40/164,432.10 = 79,732.40/x
  3. Step 3: Cross multiply
    109,621.40x = 164,432.10 × 79,732.40
  4. Step 4: Simplify right side
    109,621.40x = 13,110,565,970.04
  5. Step 5: Solve for x
    x = 13,110,565,970.04/109,621.40
  6. Step 6: Final answer
    x = 119,598.60

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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.