Home / 100,959.12-139,302.72-69,116.40

Finding the Fourth Proportional to 100,959.12, 139,302.72 and 69,116.40

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Solution

The fourth proportional to 100,959.12, 139,302.72 and 69,116.40 is: 95,366.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,959.12 : 139,302.72 = 69,116.40 : x
  2. Step 2: Convert to fraction form
    100,959.12/139,302.72 = 69,116.40/x
  3. Step 3: Cross multiply
    100,959.12x = 139,302.72 × 69,116.40
  4. Step 4: Simplify right side
    100,959.12x = 9,628,102,516.61
  5. Step 5: Solve for x
    x = 9,628,102,516.61/100,959.12
  6. Step 6: Final answer
    x = 95,366.35

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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.