Home / 120,780.14-180,356.86-98,637.44

Finding the Fourth Proportional to 120,780.14, 180,356.86 and 98,637.44

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Solution

The fourth proportional to 120,780.14, 180,356.86 and 98,637.44 is: 147,291.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,780.14 : 180,356.86 = 98,637.44 : x
  2. Step 2: Convert to fraction form
    120,780.14/180,356.86 = 98,637.44/x
  3. Step 3: Cross multiply
    120,780.14x = 180,356.86 × 98,637.44
  4. Step 4: Simplify right side
    120,780.14x = 17,789,938,956.84
  5. Step 5: Solve for x
    x = 17,789,938,956.84/120,780.14
  6. Step 6: Final answer
    x = 147,291.92

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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.