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Finding the Fourth Proportional to 71,636.82, 98,854.47 and 39,804.63

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Solution

The fourth proportional to 71,636.82, 98,854.47 and 39,804.63 is: 54,927.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,636.82 : 98,854.47 = 39,804.63 : x
  2. Step 2: Convert to fraction form
    71,636.82/98,854.47 = 39,804.63/x
  3. Step 3: Cross multiply
    71,636.82x = 98,854.47 × 39,804.63
  4. Step 4: Simplify right side
    71,636.82x = 3,934,865,602.20
  5. Step 5: Solve for x
    x = 3,934,865,602.20/71,636.82
  6. Step 6: Final answer
    x = 54,927.98

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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.