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Finding the Fourth Proportional to 75.13, 112.02 and 70.00

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Solution

The fourth proportional to 75.13, 112.02 and 70.00 is: 104.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.13 : 112.02 = 70.00 : x
  2. Step 2: Convert to fraction form
    75.13/112.02 = 70.00/x
  3. Step 3: Cross multiply
    75.13x = 112.02 × 70.00
  4. Step 4: Simplify right side
    75.13x = 7,840.86
  5. Step 5: Solve for x
    x = 7,840.86/75.13
  6. Step 6: Final answer
    x = 104.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.