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Finding the Fourth Proportional to 84,045.80, 125,895.90 and 57,780.20

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Solution

The fourth proportional to 84,045.80, 125,895.90 and 57,780.20 is: 86,551.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,045.80 : 125,895.90 = 57,780.20 : x
  2. Step 2: Convert to fraction form
    84,045.80/125,895.90 = 57,780.20/x
  3. Step 3: Cross multiply
    84,045.80x = 125,895.90 × 57,780.20
  4. Step 4: Simplify right side
    84,045.80x = 7,274,290,281.18
  5. Step 5: Solve for x
    x = 7,274,290,281.18/84,045.80
  6. Step 6: Final answer
    x = 86,551.50

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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.