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Finding the Fourth Proportional to 66,408.20, 99,612.30 and 61,339.40

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Solution

The fourth proportional to 66,408.20, 99,612.30 and 61,339.40 is: 92,009.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.20 : 99,612.30 = 61,339.40 : x
  2. Step 2: Convert to fraction form
    66,408.20/99,612.30 = 61,339.40/x
  3. Step 3: Cross multiply
    66,408.20x = 99,612.30 × 61,339.40
  4. Step 4: Simplify right side
    66,408.20x = 6,110,158,714.62
  5. Step 5: Solve for x
    x = 6,110,158,714.62/66,408.20
  6. Step 6: Final answer
    x = 92,009.10

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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.