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Finding the Fourth Proportional to 98,426, 147,639 and 31,921.76

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Solution

The fourth proportional to 98,426, 147,639 and 31,921.76 is: 47,882.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,426 : 147,639 = 31,921.76 : x
  2. Step 2: Convert to fraction form
    98,426/147,639 = 31,921.76/x
  3. Step 3: Cross multiply
    98,426x = 147,639 × 31,921.76
  4. Step 4: Simplify right side
    98,426x = 4,712,896,724.64
  5. Step 5: Solve for x
    x = 4,712,896,724.64/98,426
  6. Step 6: Final answer
    x = 47,882.64

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