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Finding the Fourth Proportional to 158,308.56, 218,486.52 and 90,309.84

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Solution

The fourth proportional to 158,308.56, 218,486.52 and 90,309.84 is: 124,639.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,308.56 : 218,486.52 = 90,309.84 : x
  2. Step 2: Convert to fraction form
    158,308.56/218,486.52 = 90,309.84/x
  3. Step 3: Cross multiply
    158,308.56x = 218,486.52 × 90,309.84
  4. Step 4: Simplify right side
    158,308.56x = 19,731,482,663.36
  5. Step 5: Solve for x
    x = 19,731,482,663.36/158,308.56
  6. Step 6: Final answer
    x = 124,639.39

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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.