Home / 109,415.25-150,988.65-61,678.50

Finding the Fourth Proportional to 109,415.25, 150,988.65 and 61,678.50

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Solution

The fourth proportional to 109,415.25, 150,988.65 and 61,678.50 is: 85,113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,415.25 : 150,988.65 = 61,678.50 : x
  2. Step 2: Convert to fraction form
    109,415.25/150,988.65 = 61,678.50/x
  3. Step 3: Cross multiply
    109,415.25x = 150,988.65 × 61,678.50
  4. Step 4: Simplify right side
    109,415.25x = 9,312,753,449.03
  5. Step 5: Solve for x
    x = 9,312,753,449.03/109,415.25
  6. Step 6: Final answer
    x = 85,113.85

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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.