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Finding the Fourth Proportional to 76,689.64, 115,017.18 and 29,918.44

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Solution

The fourth proportional to 76,689.64, 115,017.18 and 29,918.44 is: 44,870.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,689.64 : 115,017.18 = 29,918.44 : x
  2. Step 2: Convert to fraction form
    76,689.64/115,017.18 = 29,918.44/x
  3. Step 3: Cross multiply
    76,689.64x = 115,017.18 × 29,918.44
  4. Step 4: Simplify right side
    76,689.64x = 3,441,134,598.80
  5. Step 5: Solve for x
    x = 3,441,134,598.80/76,689.64
  6. Step 6: Final answer
    x = 44,870.92

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1.5x scale

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.