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Finding the Fourth Proportional to 74,987.84, 103,483.32 and 43,156.16

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Solution

The fourth proportional to 74,987.84, 103,483.32 and 43,156.16 is: 59,555.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,987.84 : 103,483.32 = 43,156.16 : x
  2. Step 2: Convert to fraction form
    74,987.84/103,483.32 = 43,156.16/x
  3. Step 3: Cross multiply
    74,987.84x = 103,483.32 × 43,156.16
  4. Step 4: Simplify right side
    74,987.84x = 4,465,942,715.25
  5. Step 5: Solve for x
    x = 4,465,942,715.25/74,987.84
  6. Step 6: Final answer
    x = 59,555.56

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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.