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Finding the Fourth Proportional to 112,989.96, 155,931.04 and 67,675.32

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Solution

The fourth proportional to 112,989.96, 155,931.04 and 67,675.32 is: 93,394.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,989.96 : 155,931.04 = 67,675.32 : x
  2. Step 2: Convert to fraction form
    112,989.96/155,931.04 = 67,675.32/x
  3. Step 3: Cross multiply
    112,989.96x = 155,931.04 × 67,675.32
  4. Step 4: Simplify right side
    112,989.96x = 10,552,683,029.93
  5. Step 5: Solve for x
    x = 10,552,683,029.93/112,989.96
  6. Step 6: Final answer
    x = 93,394.87

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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.