Home / 101,979.18-140,730.35-56,657.25

Finding the Fourth Proportional to 101,979.18, 140,730.35 and 56,657.25

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Solution

The fourth proportional to 101,979.18, 140,730.35 and 56,657.25 is: 78,186.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,979.18 : 140,730.35 = 56,657.25 : x
  2. Step 2: Convert to fraction form
    101,979.18/140,730.35 = 56,657.25/x
  3. Step 3: Cross multiply
    101,979.18x = 140,730.35 × 56,657.25
  4. Step 4: Simplify right side
    101,979.18x = 7,973,394,339.25
  5. Step 5: Solve for x
    x = 7,973,394,339.25/101,979.18
  6. Step 6: Final answer
    x = 78,186.49

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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.