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Finding the Fourth Proportional to 56,402.67, 77,838.80 and 31,251.63

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Solution

The fourth proportional to 56,402.67, 77,838.80 and 31,251.63 is: 43,128.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,402.67 : 77,838.80 = 31,251.63 : x
  2. Step 2: Convert to fraction form
    56,402.67/77,838.80 = 31,251.63/x
  3. Step 3: Cross multiply
    56,402.67x = 77,838.80 × 31,251.63
  4. Step 4: Simplify right side
    56,402.67x = 2,432,589,220.99
  5. Step 5: Solve for x
    x = 2,432,589,220.99/56,402.67
  6. Step 6: Final answer
    x = 43,128.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.