Home / 109,872.15-163,884.55-99,781.53

Finding the Fourth Proportional to 109,872.15, 163,884.55 and 99,781.53

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Solution

The fourth proportional to 109,872.15, 163,884.55 and 99,781.53 is: 148,833.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,872.15 : 163,884.55 = 99,781.53 : x
  2. Step 2: Convert to fraction form
    109,872.15/163,884.55 = 99,781.53/x
  3. Step 3: Cross multiply
    109,872.15x = 163,884.55 × 99,781.53
  4. Step 4: Simplify right side
    109,872.15x = 16,352,652,038.70
  5. Step 5: Solve for x
    x = 16,352,652,038.70/109,872.15
  6. Step 6: Final answer
    x = 148,833.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.