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Finding the Fourth Proportional to 61,140.61, 91,664.70 and 40,085.95

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Solution

The fourth proportional to 61,140.61, 91,664.70 and 40,085.95 is: 60,098.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,140.61 : 91,664.70 = 40,085.95 : x
  2. Step 2: Convert to fraction form
    61,140.61/91,664.70 = 40,085.95/x
  3. Step 3: Cross multiply
    61,140.61x = 91,664.70 × 40,085.95
  4. Step 4: Simplify right side
    61,140.61x = 3,674,466,598.84
  5. Step 5: Solve for x
    x = 3,674,466,598.84/61,140.61
  6. Step 6: Final answer
    x = 60,098.62

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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.