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Finding the Fourth Proportional to 60,980.58, 91,448.14 and 20,988.38

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Solution

The fourth proportional to 60,980.58, 91,448.14 and 20,988.38 is: 31,474.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,980.58 : 91,448.14 = 20,988.38 : x
  2. Step 2: Convert to fraction form
    60,980.58/91,448.14 = 20,988.38/x
  3. Step 3: Cross multiply
    60,980.58x = 91,448.14 × 20,988.38
  4. Step 4: Simplify right side
    60,980.58x = 1,919,347,750.43
  5. Step 5: Solve for x
    x = 1,919,347,750.43/60,980.58
  6. Step 6: Final answer
    x = 31,474.74

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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.