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Finding the Fourth Proportional to 70,921.95, 97,870.56 and 39,090.15

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Solution

The fourth proportional to 70,921.95, 97,870.56 and 39,090.15 is: 53,943.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,921.95 : 97,870.56 = 39,090.15 : x
  2. Step 2: Convert to fraction form
    70,921.95/97,870.56 = 39,090.15/x
  3. Step 3: Cross multiply
    70,921.95x = 97,870.56 × 39,090.15
  4. Step 4: Simplify right side
    70,921.95x = 3,825,774,870.98
  5. Step 5: Solve for x
    x = 3,825,774,870.98/70,921.95
  6. Step 6: Final answer
    x = 53,943.45

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