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Finding the Fourth Proportional to 78,686.95, 118,065.30 and 41,238.11

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Solution

The fourth proportional to 78,686.95, 118,065.30 and 41,238.11 is: 61,875.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,686.95 : 118,065.30 = 41,238.11 : x
  2. Step 2: Convert to fraction form
    78,686.95/118,065.30 = 41,238.11/x
  3. Step 3: Cross multiply
    78,686.95x = 118,065.30 × 41,238.11
  4. Step 4: Simplify right side
    78,686.95x = 4,868,789,622.39
  5. Step 5: Solve for x
    x = 4,868,789,622.39/78,686.95
  6. Step 6: Final answer
    x = 61,875.44

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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.