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Finding the Fourth Proportional to 158,231.76, 218,365.84 and 90,259.80

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Solution

The fourth proportional to 158,231.76, 218,365.84 and 90,259.80 is: 124,561.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,231.76 : 218,365.84 = 90,259.80 : x
  2. Step 2: Convert to fraction form
    158,231.76/218,365.84 = 90,259.80/x
  3. Step 3: Cross multiply
    158,231.76x = 218,365.84 × 90,259.80
  4. Step 4: Simplify right side
    158,231.76x = 19,709,657,045.23
  5. Step 5: Solve for x
    x = 19,709,657,045.23/158,231.76
  6. Step 6: Final answer
    x = 124,561.95

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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.