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Finding the Fourth Proportional to 83,763.40, 125,645.10 and 28,359.40

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Solution

The fourth proportional to 83,763.40, 125,645.10 and 28,359.40 is: 42,539.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,763.40 : 125,645.10 = 28,359.40 : x
  2. Step 2: Convert to fraction form
    83,763.40/125,645.10 = 28,359.40/x
  3. Step 3: Cross multiply
    83,763.40x = 125,645.10 × 28,359.40
  4. Step 4: Simplify right side
    83,763.40x = 3,563,219,648.94
  5. Step 5: Solve for x
    x = 3,563,219,648.94/83,763.40
  6. Step 6: Final answer
    x = 42,539.10

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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.