Home / 135,147.18-186,507-74,721.72

Finding the Fourth Proportional to 135,147.18, 186,507 and 74,721.72

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Solution

The fourth proportional to 135,147.18, 186,507 and 74,721.72 is: 103,118.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,147.18 : 186,507 = 74,721.72 : x
  2. Step 2: Convert to fraction form
    135,147.18/186,507 = 74,721.72/x
  3. Step 3: Cross multiply
    135,147.18x = 186,507 × 74,721.72
  4. Step 4: Simplify right side
    135,147.18x = 13,936,124,531.44
  5. Step 5: Solve for x
    x = 13,936,124,531.44/135,147.18
  6. Step 6: Final answer
    x = 103,118.13

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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.