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Finding the Fourth Proportional to 117,781.56, 162,509.49 and 72,466.92

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Solution

The fourth proportional to 117,781.56, 162,509.49 and 72,466.92 is: 99,986.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,781.56 : 162,509.49 = 72,466.92 : x
  2. Step 2: Convert to fraction form
    117,781.56/162,509.49 = 72,466.92/x
  3. Step 3: Cross multiply
    117,781.56x = 162,509.49 × 72,466.92
  4. Step 4: Simplify right side
    117,781.56x = 11,776,562,211.07
  5. Step 5: Solve for x
    x = 11,776,562,211.07/117,781.56
  6. Step 6: Final answer
    x = 99,986.47

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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.