Home / 305,144.04-421,123.73-169,220.64

Finding the Fourth Proportional to 305,144.04, 421,123.73 and 169,220.64

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Solution

The fourth proportional to 305,144.04, 421,123.73 and 169,220.64 is: 233,538.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,144.04 : 421,123.73 = 169,220.64 : x
  2. Step 2: Convert to fraction form
    305,144.04/421,123.73 = 169,220.64/x
  3. Step 3: Cross multiply
    305,144.04x = 421,123.73 × 169,220.64
  4. Step 4: Simplify right side
    305,144.04x = 71,262,827,842.90
  5. Step 5: Solve for x
    x = 71,262,827,842.90/305,144.04
  6. Step 6: Final answer
    x = 233,538.32

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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.