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Finding the Fourth Proportional to 101,987.78, 140,734.32 and 56,664.93

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Solution

The fourth proportional to 101,987.78, 140,734.32 and 56,664.93 is: 78,192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,987.78 : 140,734.32 = 56,664.93 : x
  2. Step 2: Convert to fraction form
    101,987.78/140,734.32 = 56,664.93/x
  3. Step 3: Cross multiply
    101,987.78x = 140,734.32 × 56,664.93
  4. Step 4: Simplify right side
    101,987.78x = 7,974,700,706.66
  5. Step 5: Solve for x
    x = 7,974,700,706.66/101,987.78
  6. Step 6: Final answer
    x = 78,192.71

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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.