Home / 86,427.45-129,439.75-83,434.23

Finding the Fourth Proportional to 86,427.45, 129,439.75 and 83,434.23

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Solution

The fourth proportional to 86,427.45, 129,439.75 and 83,434.23 is: 124,956.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,427.45 : 129,439.75 = 83,434.23 : x
  2. Step 2: Convert to fraction form
    86,427.45/129,439.75 = 83,434.23/x
  3. Step 3: Cross multiply
    86,427.45x = 129,439.75 × 83,434.23
  4. Step 4: Simplify right side
    86,427.45x = 10,799,705,872.64
  5. Step 5: Solve for x
    x = 10,799,705,872.64/86,427.45
  6. Step 6: Final answer
    x = 124,956.90

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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.