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Finding the Fourth Proportional to 128,203.52, 175,979.20 and 113,740.16

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Solution

The fourth proportional to 128,203.52, 175,979.20 and 113,740.16 is: 156,126.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,203.52 : 175,979.20 = 113,740.16 : x
  2. Step 2: Convert to fraction form
    128,203.52/175,979.20 = 113,740.16/x
  3. Step 3: Cross multiply
    128,203.52x = 175,979.20 × 113,740.16
  4. Step 4: Simplify right side
    128,203.52x = 20,015,902,364.67
  5. Step 5: Solve for x
    x = 20,015,902,364.67/128,203.52
  6. Step 6: Final answer
    x = 156,126.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.