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Finding the Fourth Proportional to 66,108.57, 99,078.62 and 30,970.77

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Solution

The fourth proportional to 66,108.57, 99,078.62 and 30,970.77 is: 46,416.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,108.57 : 99,078.62 = 30,970.77 : x
  2. Step 2: Convert to fraction form
    66,108.57/99,078.62 = 30,970.77/x
  3. Step 3: Cross multiply
    66,108.57x = 99,078.62 × 30,970.77
  4. Step 4: Simplify right side
    66,108.57x = 3,068,540,997.08
  5. Step 5: Solve for x
    x = 3,068,540,997.08/66,108.57
  6. Step 6: Final answer
    x = 46,416.69

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1.5x scale

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.