Home / 142,018.47-195,995.09-81,613.19

Finding the Fourth Proportional to 142,018.47, 195,995.09 and 81,613.19

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Solution

The fourth proportional to 142,018.47, 195,995.09 and 81,613.19 is: 112,631.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,018.47 : 195,995.09 = 81,613.19 : x
  2. Step 2: Convert to fraction form
    142,018.47/195,995.09 = 81,613.19/x
  3. Step 3: Cross multiply
    142,018.47x = 195,995.09 × 81,613.19
  4. Step 4: Simplify right side
    142,018.47x = 15,995,785,213.26
  5. Step 5: Solve for x
    x = 15,995,785,213.26/142,018.47
  6. Step 6: Final answer
    x = 112,631.72

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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.