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Finding the Fourth Proportional to 75,267.36, 112,976.64 and 66,888.72

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Solution

The fourth proportional to 75,267.36, 112,976.64 and 66,888.72 is: 100,400.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,267.36 : 112,976.64 = 66,888.72 : x
  2. Step 2: Convert to fraction form
    75,267.36/112,976.64 = 66,888.72/x
  3. Step 3: Cross multiply
    75,267.36x = 112,976.64 × 66,888.72
  4. Step 4: Simplify right side
    75,267.36x = 7,556,862,839.50
  5. Step 5: Solve for x
    x = 7,556,862,839.50/75,267.36
  6. Step 6: Final answer
    x = 100,400.26

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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.