Home / 120,780.35-180,357.18-98,637.65

Finding the Fourth Proportional to 120,780.35, 180,357.18 and 98,637.65

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Solution

The fourth proportional to 120,780.35, 180,357.18 and 98,637.65 is: 147,292.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,780.35 : 180,357.18 = 98,637.65 : x
  2. Step 2: Convert to fraction form
    120,780.35/180,357.18 = 98,637.65/x
  3. Step 3: Cross multiply
    120,780.35x = 180,357.18 × 98,637.65
  4. Step 4: Simplify right side
    120,780.35x = 17,790,007,800.49
  5. Step 5: Solve for x
    x = 17,790,007,800.49/120,780.35
  6. Step 6: Final answer
    x = 147,292.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.