Home / 123,430.71-170,286.16-71,739.22

Finding the Fourth Proportional to 123,430.71, 170,286.16 and 71,739.22

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Solution

The fourth proportional to 123,430.71, 170,286.16 and 71,739.22 is: 98,972.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,430.71 : 170,286.16 = 71,739.22 : x
  2. Step 2: Convert to fraction form
    123,430.71/170,286.16 = 71,739.22/x
  3. Step 3: Cross multiply
    123,430.71x = 170,286.16 × 71,739.22
  4. Step 4: Simplify right side
    123,430.71x = 12,216,196,900.26
  5. Step 5: Solve for x
    x = 12,216,196,900.26/123,430.71
  6. Step 6: Final answer
    x = 98,972.10

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1.5x scale

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.