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Finding the Fourth Proportional to 60,990.21, 91,495.04 and 18,868.59

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Solution

The fourth proportional to 60,990.21, 91,495.04 and 18,868.59 is: 28,305.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,990.21 : 91,495.04 = 18,868.59 : x
  2. Step 2: Convert to fraction form
    60,990.21/91,495.04 = 18,868.59/x
  3. Step 3: Cross multiply
    60,990.21x = 91,495.04 × 18,868.59
  4. Step 4: Simplify right side
    60,990.21x = 1,726,382,302.45
  5. Step 5: Solve for x
    x = 1,726,382,302.45/60,990.21
  6. Step 6: Final answer
    x = 28,305.89

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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.