Home / 120,815.10-180,877.05-74,159.10

Finding the Fourth Proportional to 120,815.10, 180,877.05 and 74,159.10

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Solution

The fourth proportional to 120,815.10, 180,877.05 and 74,159.10 is: 111,026.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,815.10 : 180,877.05 = 74,159.10 : x
  2. Step 2: Convert to fraction form
    120,815.10/180,877.05 = 74,159.10/x
  3. Step 3: Cross multiply
    120,815.10x = 180,877.05 × 74,159.10
  4. Step 4: Simplify right side
    120,815.10x = 13,413,679,238.66
  5. Step 5: Solve for x
    x = 13,413,679,238.66/120,815.10
  6. Step 6: Final answer
    x = 111,026.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.