Home / 123,865.92-171,005.78-81,547.46

Finding the Fourth Proportional to 123,865.92, 171,005.78 and 81,547.46

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Solution

The fourth proportional to 123,865.92, 171,005.78 and 81,547.46 is: 112,582.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,865.92 : 171,005.78 = 81,547.46 : x
  2. Step 2: Convert to fraction form
    123,865.92/171,005.78 = 81,547.46/x
  3. Step 3: Cross multiply
    123,865.92x = 171,005.78 × 81,547.46
  4. Step 4: Simplify right side
    123,865.92x = 13,945,087,004.32
  5. Step 5: Solve for x
    x = 13,945,087,004.32/123,865.92
  6. Step 6: Final answer
    x = 112,582.11

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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.