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Finding the Fourth Proportional to 99,970.81, 137,959.40 and 54,648.80

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Solution

The fourth proportional to 99,970.81, 137,959.40 and 54,648.80 is: 75,415.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,970.81 : 137,959.40 = 54,648.80 : x
  2. Step 2: Convert to fraction form
    99,970.81/137,959.40 = 54,648.80/x
  3. Step 3: Cross multiply
    99,970.81x = 137,959.40 × 54,648.80
  4. Step 4: Simplify right side
    99,970.81x = 7,539,316,107.76
  5. Step 5: Solve for x
    x = 7,539,316,107.76/99,970.81
  6. Step 6: Final answer
    x = 75,415.18

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