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Finding the Fourth Proportional to 74,987.65, 103,486.08 and 43,156.63

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Solution

The fourth proportional to 74,987.65, 103,486.08 and 43,156.63 is: 59,557.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,987.65 : 103,486.08 = 43,156.63 : x
  2. Step 2: Convert to fraction form
    74,987.65/103,486.08 = 43,156.63/x
  3. Step 3: Cross multiply
    74,987.65x = 103,486.08 × 43,156.63
  4. Step 4: Simplify right side
    74,987.65x = 4,466,110,464.71
  5. Step 5: Solve for x
    x = 4,466,110,464.71/74,987.65
  6. Step 6: Final answer
    x = 59,557.95

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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.