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Finding the Fourth Proportional to 78,679.42, 117,882.43 and 70,970.24

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Solution

The fourth proportional to 78,679.42, 117,882.43 and 70,970.24 is: 106,332.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,679.42 : 117,882.43 = 70,970.24 : x
  2. Step 2: Convert to fraction form
    78,679.42/117,882.43 = 70,970.24/x
  3. Step 3: Cross multiply
    78,679.42x = 117,882.43 × 70,970.24
  4. Step 4: Simplify right side
    78,679.42x = 8,366,143,994.03
  5. Step 5: Solve for x
    x = 8,366,143,994.03/78,679.42
  6. Step 6: Final answer
    x = 106,332.06

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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.