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Finding the Fourth Proportional to 125,909.40, 188,864.10 and 70,498.20

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Solution

The fourth proportional to 125,909.40, 188,864.10 and 70,498.20 is: 105,747.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,909.40 : 188,864.10 = 70,498.20 : x
  2. Step 2: Convert to fraction form
    125,909.40/188,864.10 = 70,498.20/x
  3. Step 3: Cross multiply
    125,909.40x = 188,864.10 × 70,498.20
  4. Step 4: Simplify right side
    125,909.40x = 13,314,579,094.62
  5. Step 5: Solve for x
    x = 13,314,579,094.62/125,909.40
  6. Step 6: Final answer
    x = 105,747.30

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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.