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Finding the Fourth Proportional to 125,720.19, 188,521.08 and 45,701.88

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Solution

The fourth proportional to 125,720.19, 188,521.08 and 45,701.88 is: 68,531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,720.19 : 188,521.08 = 45,701.88 : x
  2. Step 2: Convert to fraction form
    125,720.19/188,521.08 = 45,701.88/x
  3. Step 3: Cross multiply
    125,720.19x = 188,521.08 × 45,701.88
  4. Step 4: Simplify right side
    125,720.19x = 8,615,767,775.63
  5. Step 5: Solve for x
    x = 8,615,767,775.63/125,720.19
  6. Step 6: Final answer
    x = 68,531.30

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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.