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Finding the Fourth Proportional to 74,686.95, 112,063.37 and 39,618

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Solution

The fourth proportional to 74,686.95, 112,063.37 and 39,618 is: 59,444.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,686.95 : 112,063.37 = 39,618 : x
  2. Step 2: Convert to fraction form
    74,686.95/112,063.37 = 39,618/x
  3. Step 3: Cross multiply
    74,686.95x = 112,063.37 × 39,618
  4. Step 4: Simplify right side
    74,686.95x = 4,439,726,394.57
  5. Step 5: Solve for x
    x = 4,439,726,394.57/74,686.95
  6. Step 6: Final answer
    x = 59,444.47

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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.