Home / 81,444.12-122,061.78-70,870.20

Finding the Fourth Proportional to 81,444.12, 122,061.78 and 70,870.20

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Solution

The fourth proportional to 81,444.12, 122,061.78 and 70,870.20 is: 106,214.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,444.12 : 122,061.78 = 70,870.20 : x
  2. Step 2: Convert to fraction form
    81,444.12/122,061.78 = 70,870.20/x
  3. Step 3: Cross multiply
    81,444.12x = 122,061.78 × 70,870.20
  4. Step 4: Simplify right side
    81,444.12x = 8,650,542,760.96
  5. Step 5: Solve for x
    x = 8,650,542,760.96/81,444.12
  6. Step 6: Final answer
    x = 106,214.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.