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Finding the Fourth Proportional to 71,646.39, 98,870.07 and 39,814.47

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Solution

The fourth proportional to 71,646.39, 98,870.07 and 39,814.47 is: 54,942.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,646.39 : 98,870.07 = 39,814.47 : x
  2. Step 2: Convert to fraction form
    71,646.39/98,870.07 = 39,814.47/x
  3. Step 3: Cross multiply
    71,646.39x = 98,870.07 × 39,814.47
  4. Step 4: Simplify right side
    71,646.39x = 3,936,459,435.91
  5. Step 5: Solve for x
    x = 3,936,459,435.91/71,646.39
  6. Step 6: Final answer
    x = 54,942.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.