Home / 158,243.49-218,376-86,623.56

Finding the Fourth Proportional to 158,243.49, 218,376 and 86,623.56

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Solution

The fourth proportional to 158,243.49, 218,376 and 86,623.56 is: 119,540.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,243.49 : 218,376 = 86,623.56 : x
  2. Step 2: Convert to fraction form
    158,243.49/218,376 = 86,623.56/x
  3. Step 3: Cross multiply
    158,243.49x = 218,376 × 86,623.56
  4. Step 4: Simplify right side
    158,243.49x = 18,916,506,538.56
  5. Step 5: Solve for x
    x = 18,916,506,538.56/158,243.49
  6. Step 6: Final answer
    x = 119,540.50

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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.