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Finding the Fourth Proportional to 60,618.84, 90,969.80 and 21,175.92

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Solution

The fourth proportional to 60,618.84, 90,969.80 and 21,175.92 is: 31,778.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,618.84 : 90,969.80 = 21,175.92 : x
  2. Step 2: Convert to fraction form
    60,618.84/90,969.80 = 21,175.92/x
  3. Step 3: Cross multiply
    60,618.84x = 90,969.80 × 21,175.92
  4. Step 4: Simplify right side
    60,618.84x = 1,926,369,207.22
  5. Step 5: Solve for x
    x = 1,926,369,207.22/60,618.84
  6. Step 6: Final answer
    x = 31,778.39

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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.