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Finding the Fourth Proportional to 61,316.76, 91,984.02 and 21,870.36

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Solution

The fourth proportional to 61,316.76, 91,984.02 and 21,870.36 is: 32,808.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,316.76 : 91,984.02 = 21,870.36 : x
  2. Step 2: Convert to fraction form
    61,316.76/91,984.02 = 21,870.36/x
  3. Step 3: Cross multiply
    61,316.76x = 91,984.02 × 21,870.36
  4. Step 4: Simplify right side
    61,316.76x = 2,011,723,631.65
  5. Step 5: Solve for x
    x = 2,011,723,631.65/61,316.76
  6. Step 6: Final answer
    x = 32,808.71

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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.