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Finding the Fourth Proportional to 144,003.10, 216,004.70 and 128,839.90

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Solution

The fourth proportional to 144,003.10, 216,004.70 and 128,839.90 is: 193,259.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,003.10 : 216,004.70 = 128,839.90 : x
  2. Step 2: Convert to fraction form
    144,003.10/216,004.70 = 128,839.90/x
  3. Step 3: Cross multiply
    144,003.10x = 216,004.70 × 128,839.90
  4. Step 4: Simplify right side
    144,003.10x = 27,830,023,947.53
  5. Step 5: Solve for x
    x = 27,830,023,947.53/144,003.10
  6. Step 6: Final answer
    x = 193,259.89

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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.