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Finding the Fourth Proportional to 85,364.10, 128,046.15 and 48,039.30

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Solution

The fourth proportional to 85,364.10, 128,046.15 and 48,039.30 is: 72,058.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,364.10 : 128,046.15 = 48,039.30 : x
  2. Step 2: Convert to fraction form
    85,364.10/128,046.15 = 48,039.30/x
  3. Step 3: Cross multiply
    85,364.10x = 128,046.15 × 48,039.30
  4. Step 4: Simplify right side
    85,364.10x = 6,151,247,413.70
  5. Step 5: Solve for x
    x = 6,151,247,413.70/85,364.10
  6. Step 6: Final answer
    x = 72,058.95

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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.