Home / 79,145.58-109,231.32-45,146.28

Finding the Fourth Proportional to 79,145.58, 109,231.32 and 45,146.28

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Solution

The fourth proportional to 79,145.58, 109,231.32 and 45,146.28 is: 62,307.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,145.58 : 109,231.32 = 45,146.28 : x
  2. Step 2: Convert to fraction form
    79,145.58/109,231.32 = 45,146.28/x
  3. Step 3: Cross multiply
    79,145.58x = 109,231.32 × 45,146.28
  4. Step 4: Simplify right side
    79,145.58x = 4,931,387,757.49
  5. Step 5: Solve for x
    x = 4,931,387,757.49/79,145.58
  6. Step 6: Final answer
    x = 62,307.81

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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.