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Finding the Fourth Proportional to 85,630.06, 128,413.23 and 29,454.40

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Solution

The fourth proportional to 85,630.06, 128,413.23 and 29,454.40 is: 44,170.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,630.06 : 128,413.23 = 29,454.40 : x
  2. Step 2: Convert to fraction form
    85,630.06/128,413.23 = 29,454.40/x
  3. Step 3: Cross multiply
    85,630.06x = 128,413.23 × 29,454.40
  4. Step 4: Simplify right side
    85,630.06x = 3,782,334,641.71
  5. Step 5: Solve for x
    x = 3,782,334,641.71/85,630.06
  6. Step 6: Final answer
    x = 44,170.64

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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.