Home / 103,170.18-155,458.29-84,860.40

Finding the Fourth Proportional to 103,170.18, 155,458.29 and 84,860.40

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Solution

The fourth proportional to 103,170.18, 155,458.29 and 84,860.40 is: 127,868.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,170.18 : 155,458.29 = 84,860.40 : x
  2. Step 2: Convert to fraction form
    103,170.18/155,458.29 = 84,860.40/x
  3. Step 3: Cross multiply
    103,170.18x = 155,458.29 × 84,860.40
  4. Step 4: Simplify right side
    103,170.18x = 13,192,252,672.72
  5. Step 5: Solve for x
    x = 13,192,252,672.72/103,170.18
  6. Step 6: Final answer
    x = 127,868.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.