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Finding the Fourth Proportional to 125,585.40, 188,378.10 and 81,262.20

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Solution

The fourth proportional to 125,585.40, 188,378.10 and 81,262.20 is: 121,893.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,585.40 : 188,378.10 = 81,262.20 : x
  2. Step 2: Convert to fraction form
    125,585.40/188,378.10 = 81,262.20/x
  3. Step 3: Cross multiply
    125,585.40x = 188,378.10 × 81,262.20
  4. Step 4: Simplify right side
    125,585.40x = 15,308,018,837.82
  5. Step 5: Solve for x
    x = 15,308,018,837.82/125,585.40
  6. Step 6: Final answer
    x = 121,893.30

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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.