Home / 103,440.30-155,160.45-99,503.70

Finding the Fourth Proportional to 103,440.30, 155,160.45 and 99,503.70

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Solution

The fourth proportional to 103,440.30, 155,160.45 and 99,503.70 is: 149,255.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,440.30 : 155,160.45 = 99,503.70 : x
  2. Step 2: Convert to fraction form
    103,440.30/155,160.45 = 99,503.70/x
  3. Step 3: Cross multiply
    103,440.30x = 155,160.45 × 99,503.70
  4. Step 4: Simplify right side
    103,440.30x = 15,439,038,868.67
  5. Step 5: Solve for x
    x = 15,439,038,868.67/103,440.30
  6. Step 6: Final answer
    x = 149,255.55

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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.