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Finding the Fourth Proportional to 144,062.80, 215,656.80 and 128,316.40

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Solution

The fourth proportional to 144,062.80, 215,656.80 and 128,316.40 is: 192,085.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,062.80 : 215,656.80 = 128,316.40 : x
  2. Step 2: Convert to fraction form
    144,062.80/215,656.80 = 128,316.40/x
  3. Step 3: Cross multiply
    144,062.80x = 215,656.80 × 128,316.40
  4. Step 4: Simplify right side
    144,062.80x = 27,672,304,211.52
  5. Step 5: Solve for x
    x = 27,672,304,211.52/144,062.80
  6. Step 6: Final answer
    x = 192,085.01

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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.