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Finding the Fourth Proportional to 82,886.80, 124,184.40 and 68,015.20

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Solution

The fourth proportional to 82,886.80, 124,184.40 and 68,015.20 is: 101,903.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,886.80 : 124,184.40 = 68,015.20 : x
  2. Step 2: Convert to fraction form
    82,886.80/124,184.40 = 68,015.20/x
  3. Step 3: Cross multiply
    82,886.80x = 124,184.40 × 68,015.20
  4. Step 4: Simplify right side
    82,886.80x = 8,446,426,802.88
  5. Step 5: Solve for x
    x = 8,446,426,802.88/82,886.80
  6. Step 6: Final answer
    x = 101,903.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.