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Finding the Fourth Proportional to 90,615.14, 135,922.71 and 28,290.98

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Solution

The fourth proportional to 90,615.14, 135,922.71 and 28,290.98 is: 42,436.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,615.14 : 135,922.71 = 28,290.98 : x
  2. Step 2: Convert to fraction form
    90,615.14/135,922.71 = 28,290.98/x
  3. Step 3: Cross multiply
    90,615.14x = 135,922.71 × 28,290.98
  4. Step 4: Simplify right side
    90,615.14x = 3,845,386,670.16
  5. Step 5: Solve for x
    x = 3,845,386,670.16/90,615.14
  6. Step 6: Final answer
    x = 42,436.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.