Home / 65,510.13-90,413.85-40,031.28

Finding the Fourth Proportional to 65,510.13, 90,413.85 and 40,031.28

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Solution

The fourth proportional to 65,510.13, 90,413.85 and 40,031.28 is: 55,249.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,510.13 : 90,413.85 = 40,031.28 : x
  2. Step 2: Convert to fraction form
    65,510.13/90,413.85 = 40,031.28/x
  3. Step 3: Cross multiply
    65,510.13x = 90,413.85 × 40,031.28
  4. Step 4: Simplify right side
    65,510.13x = 3,619,382,145.23
  5. Step 5: Solve for x
    x = 3,619,382,145.23/65,510.13
  6. Step 6: Final answer
    x = 55,249.20

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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.