Home / 101,260.12-139,739.42-55,320.40

Finding the Fourth Proportional to 101,260.12, 139,739.42 and 55,320.40

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Solution

The fourth proportional to 101,260.12, 139,739.42 and 55,320.40 is: 76,342.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,260.12 : 139,739.42 = 55,320.40 : x
  2. Step 2: Convert to fraction form
    101,260.12/139,739.42 = 55,320.40/x
  3. Step 3: Cross multiply
    101,260.12x = 139,739.42 × 55,320.40
  4. Step 4: Simplify right side
    101,260.12x = 7,730,440,610.17
  5. Step 5: Solve for x
    x = 7,730,440,610.17/101,260.12
  6. Step 6: Final answer
    x = 76,342.40

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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.