Home / 93,090.72-139,767.30-66,781.12

Finding the Fourth Proportional to 93,090.72, 139,767.30 and 66,781.12

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Solution

The fourth proportional to 93,090.72, 139,767.30 and 66,781.12 is: 100,265.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,090.72 : 139,767.30 = 66,781.12 : x
  2. Step 2: Convert to fraction form
    93,090.72/139,767.30 = 66,781.12/x
  3. Step 3: Cross multiply
    93,090.72x = 139,767.30 × 66,781.12
  4. Step 4: Simplify right side
    93,090.72x = 9,333,816,833.38
  5. Step 5: Solve for x
    x = 9,333,816,833.38/93,090.72
  6. Step 6: Final answer
    x = 100,265.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.