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Finding the Fourth Proportional to 66,347,831.22, 91,557,509.85 and 38,471,717.81

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Solution

The fourth proportional to 66,347,831.22, 91,557,509.85 and 38,471,717.81 is: 53,089,522.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,347,831.22 : 91,557,509.85 = 38,471,717.81 : x
  2. Step 2: Convert to fraction form
    66,347,831.22/91,557,509.85 = 38,471,717.81/x
  3. Step 3: Cross multiply
    66,347,831.22x = 91,557,509.85 × 38,471,717.81
  4. Step 4: Simplify right side
    66,347,831.22x = 3,522,374,681,877,707.50
  5. Step 5: Solve for x
    x = 3,522,374,681,877,707.50/66,347,831.22
  6. Step 6: Final answer
    x = 53,089,522.55

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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.