Home / 78,492.12-108,318.84-42,682.20

Finding the Fourth Proportional to 78,492.12, 108,318.84 and 42,682.20

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Solution

The fourth proportional to 78,492.12, 108,318.84 and 42,682.20 is: 58,901.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,492.12 : 108,318.84 = 42,682.20 : x
  2. Step 2: Convert to fraction form
    78,492.12/108,318.84 = 42,682.20/x
  3. Step 3: Cross multiply
    78,492.12x = 108,318.84 × 42,682.20
  4. Step 4: Simplify right side
    78,492.12x = 4,623,286,392.65
  5. Step 5: Solve for x
    x = 4,623,286,392.65/78,492.12
  6. Step 6: Final answer
    x = 58,901.28

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1.5x scale

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.