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Finding the Fourth Proportional to 113,430.48, 156,531.40 and 63,128.40

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Solution

The fourth proportional to 113,430.48, 156,531.40 and 63,128.40 is: 87,115.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,430.48 : 156,531.40 = 63,128.40 : x
  2. Step 2: Convert to fraction form
    113,430.48/156,531.40 = 63,128.40/x
  3. Step 3: Cross multiply
    113,430.48x = 156,531.40 × 63,128.40
  4. Step 4: Simplify right side
    113,430.48x = 9,881,576,831.76
  5. Step 5: Solve for x
    x = 9,881,576,831.76/113,430.48
  6. Step 6: Final answer
    x = 87,115.71

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