Home / 130,440.47-178,659.11-122,780.50

Finding the Fourth Proportional to 130,440.47, 178,659.11 and 122,780.50

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Solution

The fourth proportional to 130,440.47, 178,659.11 and 122,780.50 is: 168,167.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,440.47 : 178,659.11 = 122,780.50 : x
  2. Step 2: Convert to fraction form
    130,440.47/178,659.11 = 122,780.50/x
  3. Step 3: Cross multiply
    130,440.47x = 178,659.11 × 122,780.50
  4. Step 4: Simplify right side
    130,440.47x = 21,935,853,348.16
  5. Step 5: Solve for x
    x = 21,935,853,348.16/130,440.47
  6. Step 6: Final answer
    x = 168,167.55

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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.