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Finding the Fourth Proportional to 61,688.78, 85,130.77 and 33,394.47

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Solution

The fourth proportional to 61,688.78, 85,130.77 and 33,394.47 is: 46,084.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,688.78 : 85,130.77 = 33,394.47 : x
  2. Step 2: Convert to fraction form
    61,688.78/85,130.77 = 33,394.47/x
  3. Step 3: Cross multiply
    61,688.78x = 85,130.77 × 33,394.47
  4. Step 4: Simplify right side
    61,688.78x = 2,842,896,944.84
  5. Step 5: Solve for x
    x = 2,842,896,944.84/61,688.78
  6. Step 6: Final answer
    x = 46,084.51

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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.