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Finding the Fourth Proportional to 63,413.93, 87,420.79 and 45,503.21

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Solution

The fourth proportional to 63,413.93, 87,420.79 and 45,503.21 is: 62,729.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,413.93 : 87,420.79 = 45,503.21 : x
  2. Step 2: Convert to fraction form
    63,413.93/87,420.79 = 45,503.21/x
  3. Step 3: Cross multiply
    63,413.93x = 87,420.79 × 45,503.21
  4. Step 4: Simplify right side
    63,413.93x = 3,977,926,565.74
  5. Step 5: Solve for x
    x = 3,977,926,565.74/63,413.93
  6. Step 6: Final answer
    x = 62,729.54

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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.