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Finding the Fourth Proportional to 103,999.90, 155,999.85 and 83,955.10

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Solution

The fourth proportional to 103,999.90, 155,999.85 and 83,955.10 is: 125,932.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,999.90 : 155,999.85 = 83,955.10 : x
  2. Step 2: Convert to fraction form
    103,999.90/155,999.85 = 83,955.10/x
  3. Step 3: Cross multiply
    103,999.90x = 155,999.85 × 83,955.10
  4. Step 4: Simplify right side
    103,999.90x = 13,096,983,006.74
  5. Step 5: Solve for x
    x = 13,096,983,006.74/103,999.90
  6. Step 6: Final answer
    x = 125,932.65

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1.5x scale

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.