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Finding the Fourth Proportional to 61,085.34, 91,549.71 and 53,154.90

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Solution

The fourth proportional to 61,085.34, 91,549.71 and 53,154.90 is: 79,664.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,085.34 : 91,549.71 = 53,154.90 : x
  2. Step 2: Convert to fraction form
    61,085.34/91,549.71 = 53,154.90/x
  3. Step 3: Cross multiply
    61,085.34x = 91,549.71 × 53,154.90
  4. Step 4: Simplify right side
    61,085.34x = 4,866,315,680.08
  5. Step 5: Solve for x
    x = 4,866,315,680.08/61,085.34
  6. Step 6: Final answer
    x = 79,664.22

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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.