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Finding the Fourth Proportional to 121,127,978.80, 181,691,968.20 and 70,109,642.80

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Solution

The fourth proportional to 121,127,978.80, 181,691,968.20 and 70,109,642.80 is: 105,164,464.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,127,978.80 : 181,691,968.20 = 70,109,642.80 : x
  2. Step 2: Convert to fraction form
    121,127,978.80/181,691,968.20 = 70,109,642.80/x
  3. Step 3: Cross multiply
    121,127,978.80x = 181,691,968.20 × 70,109,642.80
  4. Step 4: Simplify right side
    121,127,978.80x = 12,738,358,990,130,958
  5. Step 5: Solve for x
    x = 12,738,358,990,130,958/121,127,978.80
  6. Step 6: Final answer
    x = 105,164,464.20

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Why These Related Problems?

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