Home / 100,520.12-138,718.26-62,816.12

Finding the Fourth Proportional to 100,520.12, 138,718.26 and 62,816.12

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Solution

The fourth proportional to 100,520.12, 138,718.26 and 62,816.12 is: 86,686.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,520.12 : 138,718.26 = 62,816.12 : x
  2. Step 2: Convert to fraction form
    100,520.12/138,718.26 = 62,816.12/x
  3. Step 3: Cross multiply
    100,520.12x = 138,718.26 × 62,816.12
  4. Step 4: Simplify right side
    100,520.12x = 8,713,742,866.35
  5. Step 5: Solve for x
    x = 8,713,742,866.35/100,520.12
  6. Step 6: Final answer
    x = 86,686.55

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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.