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Finding the Fourth Proportional to 86,978,831.40, 130,468,247.10 and 38,431,696.05

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Solution

The fourth proportional to 86,978,831.40, 130,468,247.10 and 38,431,696.05 is: 57,647,544.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,978,831.40 : 130,468,247.10 = 38,431,696.05 : x
  2. Step 2: Convert to fraction form
    86,978,831.40/130,468,247.10 = 38,431,696.05/x
  3. Step 3: Cross multiply
    86,978,831.40x = 130,468,247.10 × 38,431,696.05
  4. Step 4: Simplify right side
    86,978,831.40x = 5,014,116,016,723,493
  5. Step 5: Solve for x
    x = 5,014,116,016,723,493/86,978,831.40
  6. Step 6: Final answer
    x = 57,647,544.08

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.