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Finding the Fourth Proportional to 70,800.13, 97,724.84 and 42,139.90

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Solution

The fourth proportional to 70,800.13, 97,724.84 and 42,139.90 is: 58,165.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,800.13 : 97,724.84 = 42,139.90 : x
  2. Step 2: Convert to fraction form
    70,800.13/97,724.84 = 42,139.90/x
  3. Step 3: Cross multiply
    70,800.13x = 97,724.84 × 42,139.90
  4. Step 4: Simplify right side
    70,800.13x = 4,118,114,985.12
  5. Step 5: Solve for x
    x = 4,118,114,985.12/70,800.13
  6. Step 6: Final answer
    x = 58,165.36

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