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Finding the Fourth Proportional to 147,943.80, 221,879.70 and 42,751.80

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Solution

The fourth proportional to 147,943.80, 221,879.70 and 42,751.80 is: 64,117.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,943.80 : 221,879.70 = 42,751.80 : x
  2. Step 2: Convert to fraction form
    147,943.80/221,879.70 = 42,751.80/x
  3. Step 3: Cross multiply
    147,943.80x = 221,879.70 × 42,751.80
  4. Step 4: Simplify right side
    147,943.80x = 9,485,756,558.46
  5. Step 5: Solve for x
    x = 9,485,756,558.46/147,943.80
  6. Step 6: Final answer
    x = 64,117.30

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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.