Home / 83,868.40-125,583.90-79,931.80

Finding the Fourth Proportional to 83,868.40, 125,583.90 and 79,931.80

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Solution

The fourth proportional to 83,868.40, 125,583.90 and 79,931.80 is: 119,689.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,868.40 : 125,583.90 = 79,931.80 : x
  2. Step 2: Convert to fraction form
    83,868.40/125,583.90 = 79,931.80/x
  3. Step 3: Cross multiply
    83,868.40x = 125,583.90 × 79,931.80
  4. Step 4: Simplify right side
    83,868.40x = 10,038,147,178.02
  5. Step 5: Solve for x
    x = 10,038,147,178.02/83,868.40
  6. Step 6: Final answer
    x = 119,689.27

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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.