Home / 99,989.30-137,987.84-54,669.19

Finding the Fourth Proportional to 99,989.30, 137,987.84 and 54,669.19

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Solution

The fourth proportional to 99,989.30, 137,987.84 and 54,669.19 is: 75,444.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,989.30 : 137,987.84 = 54,669.19 : x
  2. Step 2: Convert to fraction form
    99,989.30/137,987.84 = 54,669.19/x
  3. Step 3: Cross multiply
    99,989.30x = 137,987.84 × 54,669.19
  4. Step 4: Simplify right side
    99,989.30x = 7,543,683,169.30
  5. Step 5: Solve for x
    x = 7,543,683,169.30/99,989.30
  6. Step 6: Final answer
    x = 75,444.91

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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.