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Finding the Fourth Proportional to 74,978.24, 112,465.12 and 19,574.24

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Solution

The fourth proportional to 74,978.24, 112,465.12 and 19,574.24 is: 29,360.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,978.24 : 112,465.12 = 19,574.24 : x
  2. Step 2: Convert to fraction form
    74,978.24/112,465.12 = 19,574.24/x
  3. Step 3: Cross multiply
    74,978.24x = 112,465.12 × 19,574.24
  4. Step 4: Simplify right side
    74,978.24x = 2,201,419,250.51
  5. Step 5: Solve for x
    x = 2,201,419,250.51/74,978.24
  6. Step 6: Final answer
    x = 29,360.78

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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.