Home / 101,987.12-140,751.78-61,710.86

Finding the Fourth Proportional to 101,987.12, 140,751.78 and 61,710.86

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Solution

The fourth proportional to 101,987.12, 140,751.78 and 61,710.86 is: 85,166.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,987.12 : 140,751.78 = 61,710.86 : x
  2. Step 2: Convert to fraction form
    101,987.12/140,751.78 = 61,710.86/x
  3. Step 3: Cross multiply
    101,987.12x = 140,751.78 × 61,710.86
  4. Step 4: Simplify right side
    101,987.12x = 8,685,913,390.33
  5. Step 5: Solve for x
    x = 8,685,913,390.33/101,987.12
  6. Step 6: Final answer
    x = 85,166.77

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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.