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Finding the Fourth Proportional to 158,391.63, 218,525.76 and 90,359.55

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Solution

The fourth proportional to 158,391.63, 218,525.76 and 90,359.55 is: 124,664.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,391.63 : 218,525.76 = 90,359.55 : x
  2. Step 2: Convert to fraction form
    158,391.63/218,525.76 = 90,359.55/x
  3. Step 3: Cross multiply
    158,391.63x = 218,525.76 × 90,359.55
  4. Step 4: Simplify right side
    158,391.63x = 19,745,889,337.01
  5. Step 5: Solve for x
    x = 19,745,889,337.01/158,391.63
  6. Step 6: Final answer
    x = 124,664.98

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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.