Home / 86,938.18-120,032.30-66,758.86

Finding the Fourth Proportional to 86,938.18, 120,032.30 and 66,758.86

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Solution

The fourth proportional to 86,938.18, 120,032.30 and 66,758.86 is: 92,171.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,938.18 : 120,032.30 = 66,758.86 : x
  2. Step 2: Convert to fraction form
    86,938.18/120,032.30 = 66,758.86/x
  3. Step 3: Cross multiply
    86,938.18x = 120,032.30 × 66,758.86
  4. Step 4: Simplify right side
    86,938.18x = 8,013,219,511.18
  5. Step 5: Solve for x
    x = 8,013,219,511.18/86,938.18
  6. Step 6: Final answer
    x = 92,171.47

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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.