Home / 147,643.35-221,562.74-81,129.80

Finding the Fourth Proportional to 147,643.35, 221,562.74 and 81,129.80

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Solution

The fourth proportional to 147,643.35, 221,562.74 and 81,129.80 is: 121,748.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,643.35 : 221,562.74 = 81,129.80 : x
  2. Step 2: Convert to fraction form
    147,643.35/221,562.74 = 81,129.80/x
  3. Step 3: Cross multiply
    147,643.35x = 221,562.74 × 81,129.80
  4. Step 4: Simplify right side
    147,643.35x = 17,975,339,837.74
  5. Step 5: Solve for x
    x = 17,975,339,837.74/147,643.35
  6. Step 6: Final answer
    x = 121,748.39

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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.