Home / 130,507.38-180,126.09-85,192.74

Finding the Fourth Proportional to 130,507.38, 180,126.09 and 85,192.74

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Solution

The fourth proportional to 130,507.38, 180,126.09 and 85,192.74 is: 117,582.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,507.38 : 180,126.09 = 85,192.74 : x
  2. Step 2: Convert to fraction form
    130,507.38/180,126.09 = 85,192.74/x
  3. Step 3: Cross multiply
    130,507.38x = 180,126.09 × 85,192.74
  4. Step 4: Simplify right side
    130,507.38x = 15,345,435,152.59
  5. Step 5: Solve for x
    x = 15,345,435,152.59/130,507.38
  6. Step 6: Final answer
    x = 117,582.89

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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.