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Finding the Fourth Proportional to 125,784.40, 188,822.40 and 75,920.80

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Solution

The fourth proportional to 125,784.40, 188,822.40 and 75,920.80 is: 113,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,784.40 : 188,822.40 = 75,920.80 : x
  2. Step 2: Convert to fraction form
    125,784.40/188,822.40 = 75,920.80/x
  3. Step 3: Cross multiply
    125,784.40x = 188,822.40 × 75,920.80
  4. Step 4: Simplify right side
    125,784.40x = 14,335,547,665.92
  5. Step 5: Solve for x
    x = 14,335,547,665.92/125,784.40
  6. Step 6: Final answer
    x = 113,969.20

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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.