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Finding the Fourth Proportional to 101,139.80, 151,746.15 and 42,017.90

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Solution

The fourth proportional to 101,139.80, 151,746.15 and 42,017.90 is: 63,041.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,139.80 : 151,746.15 = 42,017.90 : x
  2. Step 2: Convert to fraction form
    101,139.80/151,746.15 = 42,017.90/x
  3. Step 3: Cross multiply
    101,139.80x = 151,746.15 × 42,017.90
  4. Step 4: Simplify right side
    101,139.80x = 6,376,054,556.09
  5. Step 5: Solve for x
    x = 6,376,054,556.09/101,139.80
  6. Step 6: Final answer
    x = 63,041.99

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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.