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Finding the Fourth Proportional to 72,765.86, 100,413.54 and 51,264.23

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Solution

The fourth proportional to 72,765.86, 100,413.54 and 51,264.23 is: 70,742.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,765.86 : 100,413.54 = 51,264.23 : x
  2. Step 2: Convert to fraction form
    72,765.86/100,413.54 = 51,264.23/x
  3. Step 3: Cross multiply
    72,765.86x = 100,413.54 × 51,264.23
  4. Step 4: Simplify right side
    72,765.86x = 5,147,622,809.67
  5. Step 5: Solve for x
    x = 5,147,622,809.67/72,765.86
  6. Step 6: Final answer
    x = 70,742.28

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1.5x scale

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.