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Finding the Fourth Proportional to 79,164.45, 109,247.13 and 42,866.28

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Solution

The fourth proportional to 79,164.45, 109,247.13 and 42,866.28 is: 59,155.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,164.45 : 109,247.13 = 42,866.28 : x
  2. Step 2: Convert to fraction form
    79,164.45/109,247.13 = 42,866.28/x
  3. Step 3: Cross multiply
    79,164.45x = 109,247.13 × 42,866.28
  4. Step 4: Simplify right side
    79,164.45x = 4,683,018,063.78
  5. Step 5: Solve for x
    x = 4,683,018,063.78/79,164.45
  6. Step 6: Final answer
    x = 59,155.57

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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.