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Finding the Fourth Proportional to 86,124.76, 129,210.18 and 77,899.48

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Solution

The fourth proportional to 86,124.76, 129,210.18 and 77,899.48 is: 116,870.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,124.76 : 129,210.18 = 77,899.48 : x
  2. Step 2: Convert to fraction form
    86,124.76/129,210.18 = 77,899.48/x
  3. Step 3: Cross multiply
    86,124.76x = 129,210.18 × 77,899.48
  4. Step 4: Simplify right side
    86,124.76x = 10,065,405,832.71
  5. Step 5: Solve for x
    x = 10,065,405,832.71/86,124.76
  6. Step 6: Final answer
    x = 116,870.06

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