Home / 99,980.04-137,782.14-71,636.52

Finding the Fourth Proportional to 99,980.04, 137,782.14 and 71,636.52

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Solution

The fourth proportional to 99,980.04, 137,782.14 and 71,636.52 is: 98,722.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,980.04 : 137,782.14 = 71,636.52 : x
  2. Step 2: Convert to fraction form
    99,980.04/137,782.14 = 71,636.52/x
  3. Step 3: Cross multiply
    99,980.04x = 137,782.14 × 71,636.52
  4. Step 4: Simplify right side
    99,980.04x = 9,870,233,027.75
  5. Step 5: Solve for x
    x = 9,870,233,027.75/99,980.04
  6. Step 6: Final answer
    x = 98,722.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.