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Finding the Fourth Proportional to 74,911.30, 112,036.29 and 66,649.30

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Solution

The fourth proportional to 74,911.30, 112,036.29 and 66,649.30 is: 99,679.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,911.30 : 112,036.29 = 66,649.30 : x
  2. Step 2: Convert to fraction form
    74,911.30/112,036.29 = 66,649.30/x
  3. Step 3: Cross multiply
    74,911.30x = 112,036.29 × 66,649.30
  4. Step 4: Simplify right side
    74,911.30x = 7,467,140,303.10
  5. Step 5: Solve for x
    x = 7,467,140,303.10/74,911.30
  6. Step 6: Final answer
    x = 99,679.76

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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.