Home / 89,831.03-123,888.08-71,919.50

Finding the Fourth Proportional to 89,831.03, 123,888.08 and 71,919.50

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Solution

The fourth proportional to 89,831.03, 123,888.08 and 71,919.50 is: 99,185.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,831.03 : 123,888.08 = 71,919.50 : x
  2. Step 2: Convert to fraction form
    89,831.03/123,888.08 = 71,919.50/x
  3. Step 3: Cross multiply
    89,831.03x = 123,888.08 × 71,919.50
  4. Step 4: Simplify right side
    89,831.03x = 8,909,968,329.92
  5. Step 5: Solve for x
    x = 8,909,968,329.92/89,831.03
  6. Step 6: Final answer
    x = 99,185.87

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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.