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Finding the Fourth Proportional to 61,079.63, 91,596.91 and 21,088.39

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Solution

The fourth proportional to 61,079.63, 91,596.91 and 21,088.39 is: 31,624.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,079.63 : 91,596.91 = 21,088.39 : x
  2. Step 2: Convert to fraction form
    61,079.63/91,596.91 = 21,088.39/x
  3. Step 3: Cross multiply
    61,079.63x = 91,596.91 × 21,088.39
  4. Step 4: Simplify right side
    61,079.63x = 1,931,631,830.24
  5. Step 5: Solve for x
    x = 1,931,631,830.24/61,079.63
  6. Step 6: Final answer
    x = 31,624.81

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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.