Home / 85,938.40-128,876.78-29,763.42

Finding the Fourth Proportional to 85,938.40, 128,876.78 and 29,763.42

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Solution

The fourth proportional to 85,938.40, 128,876.78 and 29,763.42 is: 44,634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,938.40 : 128,876.78 = 29,763.42 : x
  2. Step 2: Convert to fraction form
    85,938.40/128,876.78 = 29,763.42/x
  3. Step 3: Cross multiply
    85,938.40x = 128,876.78 × 29,763.42
  4. Step 4: Simplify right side
    85,938.40x = 3,835,813,731.39
  5. Step 5: Solve for x
    x = 3,835,813,731.39/85,938.40
  6. Step 6: Final answer
    x = 44,634.46

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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.