Home / 112,419.78-155,071.38-74,165.70

Finding the Fourth Proportional to 112,419.78, 155,071.38 and 74,165.70

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Solution

The fourth proportional to 112,419.78, 155,071.38 and 74,165.70 is: 102,303.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,419.78 : 155,071.38 = 74,165.70 : x
  2. Step 2: Convert to fraction form
    112,419.78/155,071.38 = 74,165.70/x
  3. Step 3: Cross multiply
    112,419.78x = 155,071.38 × 74,165.70
  4. Step 4: Simplify right side
    112,419.78x = 11,500,977,447.67
  5. Step 5: Solve for x
    x = 11,500,977,447.67/112,419.78
  6. Step 6: Final answer
    x = 102,303.86

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1.5x scale

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.