Home / 85,631.20-128,456.40-26,466.40

Finding the Fourth Proportional to 85,631.20, 128,456.40 and 26,466.40

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Solution

The fourth proportional to 85,631.20, 128,456.40 and 26,466.40 is: 39,702.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,631.20 : 128,456.40 = 26,466.40 : x
  2. Step 2: Convert to fraction form
    85,631.20/128,456.40 = 26,466.40/x
  3. Step 3: Cross multiply
    85,631.20x = 128,456.40 × 26,466.40
  4. Step 4: Simplify right side
    85,631.20x = 3,399,778,464.96
  5. Step 5: Solve for x
    x = 3,399,778,464.96/85,631.20
  6. Step 6: Final answer
    x = 39,702.57

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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.