Home / 123,072.90-169,842.78-72,122.28

Finding the Fourth Proportional to 123,072.90, 169,842.78 and 72,122.28

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Solution

The fourth proportional to 123,072.90, 169,842.78 and 72,122.28 is: 99,530.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,072.90 : 169,842.78 = 72,122.28 : x
  2. Step 2: Convert to fraction form
    123,072.90/169,842.78 = 72,122.28/x
  3. Step 3: Cross multiply
    123,072.90x = 169,842.78 × 72,122.28
  4. Step 4: Simplify right side
    123,072.90x = 12,249,448,535.14
  5. Step 5: Solve for x
    x = 12,249,448,535.14/123,072.90
  6. Step 6: Final answer
    x = 99,530.02

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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.