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Finding the Fourth Proportional to 117,405.72, 162,020.21 and 63,690.74

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Solution

The fourth proportional to 117,405.72, 162,020.21 and 63,690.74 is: 87,893.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,405.72 : 162,020.21 = 63,690.74 : x
  2. Step 2: Convert to fraction form
    117,405.72/162,020.21 = 63,690.74/x
  3. Step 3: Cross multiply
    117,405.72x = 162,020.21 × 63,690.74
  4. Step 4: Simplify right side
    117,405.72x = 10,319,187,069.86
  5. Step 5: Solve for x
    x = 10,319,187,069.86/117,405.72
  6. Step 6: Final answer
    x = 87,893.39

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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.