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Finding the Fourth Proportional to 42,062.63, 63,109.80 and 19,879.70

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Solution

The fourth proportional to 42,062.63, 63,109.80 and 19,879.70 is: 29,827.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,062.63 : 63,109.80 = 19,879.70 : x
  2. Step 2: Convert to fraction form
    42,062.63/63,109.80 = 19,879.70/x
  3. Step 3: Cross multiply
    42,062.63x = 63,109.80 × 19,879.70
  4. Step 4: Simplify right side
    42,062.63x = 1,254,603,575.51
  5. Step 5: Solve for x
    x = 1,254,603,575.51/42,062.63
  6. Step 6: Final answer
    x = 29,827.04

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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.