Home / 147,821.20-221,731.80-42,643.60

Finding the Fourth Proportional to 147,821.20, 221,731.80 and 42,643.60

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Solution

The fourth proportional to 147,821.20, 221,731.80 and 42,643.60 is: 63,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,821.20 : 221,731.80 = 42,643.60 : x
  2. Step 2: Convert to fraction form
    147,821.20/221,731.80 = 42,643.60/x
  3. Step 3: Cross multiply
    147,821.20x = 221,731.80 × 42,643.60
  4. Step 4: Simplify right side
    147,821.20x = 9,455,442,186.48
  5. Step 5: Solve for x
    x = 9,455,442,186.48/147,821.20
  6. Step 6: Final answer
    x = 63,965.40

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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.