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Finding the Fourth Proportional to 79,155.88, 109,286.10 and 70,643.32

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Solution

The fourth proportional to 79,155.88, 109,286.10 and 70,643.32 is: 97,533.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,155.88 : 109,286.10 = 70,643.32 : x
  2. Step 2: Convert to fraction form
    79,155.88/109,286.10 = 70,643.32/x
  3. Step 3: Cross multiply
    79,155.88x = 109,286.10 × 70,643.32
  4. Step 4: Simplify right side
    79,155.88x = 7,720,332,933.85
  5. Step 5: Solve for x
    x = 7,720,332,933.85/79,155.88
  6. Step 6: Final answer
    x = 97,533.28

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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.