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Finding the Fourth Proportional to 125,274.72, 187,911.72 and 31,780.20

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Solution

The fourth proportional to 125,274.72, 187,911.72 and 31,780.20 is: 47,670.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,274.72 : 187,911.72 = 31,780.20 : x
  2. Step 2: Convert to fraction form
    125,274.72/187,911.72 = 31,780.20/x
  3. Step 3: Cross multiply
    125,274.72x = 187,911.72 × 31,780.20
  4. Step 4: Simplify right side
    125,274.72x = 5,971,872,043.94
  5. Step 5: Solve for x
    x = 5,971,872,043.94/125,274.72
  6. Step 6: Final answer
    x = 47,670.21

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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.