Home / 138,163.13-190,665.12-78,547.13

Finding the Fourth Proportional to 138,163.13, 190,665.12 and 78,547.13

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Solution

The fourth proportional to 138,163.13, 190,665.12 and 78,547.13 is: 108,395.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,163.13 : 190,665.12 = 78,547.13 : x
  2. Step 2: Convert to fraction form
    138,163.13/190,665.12 = 78,547.13/x
  3. Step 3: Cross multiply
    138,163.13x = 190,665.12 × 78,547.13
  4. Step 4: Simplify right side
    138,163.13x = 14,976,197,013.78
  5. Step 5: Solve for x
    x = 14,976,197,013.78/138,163.13
  6. Step 6: Final answer
    x = 108,395.04

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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.