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Finding the Fourth Proportional to 147,704.76, 203,319.45 and 128,809.08

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Solution

The fourth proportional to 147,704.76, 203,319.45 and 128,809.08 is: 177,309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,704.76 : 203,319.45 = 128,809.08 : x
  2. Step 2: Convert to fraction form
    147,704.76/203,319.45 = 128,809.08/x
  3. Step 3: Cross multiply
    147,704.76x = 203,319.45 × 128,809.08
  4. Step 4: Simplify right side
    147,704.76x = 26,189,391,300.61
  5. Step 5: Solve for x
    x = 26,189,391,300.61/147,704.76
  6. Step 6: Final answer
    x = 177,309.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.