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Finding the Fourth Proportional to 108,547.70, 162,821.55 and 90,115.70

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Solution

The fourth proportional to 108,547.70, 162,821.55 and 90,115.70 is: 135,173.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,547.70 : 162,821.55 = 90,115.70 : x
  2. Step 2: Convert to fraction form
    108,547.70/162,821.55 = 90,115.70/x
  3. Step 3: Cross multiply
    108,547.70x = 162,821.55 × 90,115.70
  4. Step 4: Simplify right side
    108,547.70x = 14,672,777,953.34
  5. Step 5: Solve for x
    x = 14,672,777,953.34/108,547.70
  6. Step 6: Final answer
    x = 135,173.55

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