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Finding the Fourth Proportional to 143,587.61, 215,413.53 and 43,755.61

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Solution

The fourth proportional to 143,587.61, 215,413.53 and 43,755.61 is: 65,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,587.61 : 215,413.53 = 43,755.61 : x
  2. Step 2: Convert to fraction form
    143,587.61/215,413.53 = 43,755.61/x
  3. Step 3: Cross multiply
    143,587.61x = 215,413.53 × 43,755.61
  4. Step 4: Simplify right side
    143,587.61x = 9,425,550,407.40
  5. Step 5: Solve for x
    x = 9,425,550,407.40/143,587.61
  6. Step 6: Final answer
    x = 65,643.20

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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.