Home / 65,470.39-90,346.74-40,019.38

Finding the Fourth Proportional to 65,470.39, 90,346.74 and 40,019.38

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Solution

The fourth proportional to 65,470.39, 90,346.74 and 40,019.38 is: 55,225.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,470.39 : 90,346.74 = 40,019.38 : x
  2. Step 2: Convert to fraction form
    65,470.39/90,346.74 = 40,019.38/x
  3. Step 3: Cross multiply
    65,470.39x = 90,346.74 × 40,019.38
  4. Step 4: Simplify right side
    65,470.39x = 3,615,620,519.82
  5. Step 5: Solve for x
    x = 3,615,620,519.82/65,470.39
  6. Step 6: Final answer
    x = 55,225.28

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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.