Home / 102,876.18-142,017.66-77,392.24

Finding the Fourth Proportional to 102,876.18, 142,017.66 and 77,392.24

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Solution

The fourth proportional to 102,876.18, 142,017.66 and 77,392.24 is: 106,837.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,876.18 : 142,017.66 = 77,392.24 : x
  2. Step 2: Convert to fraction form
    102,876.18/142,017.66 = 77,392.24/x
  3. Step 3: Cross multiply
    102,876.18x = 142,017.66 × 77,392.24
  4. Step 4: Simplify right side
    102,876.18x = 10,991,065,230.09
  5. Step 5: Solve for x
    x = 10,991,065,230.09/102,876.18
  6. Step 6: Final answer
    x = 106,837.81

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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.