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Finding the Fourth Proportional to 93,637.20, 140,164.20 and 90,721.20

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Solution

The fourth proportional to 93,637.20, 140,164.20 and 90,721.20 is: 135,799.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,637.20 : 140,164.20 = 90,721.20 : x
  2. Step 2: Convert to fraction form
    93,637.20/140,164.20 = 90,721.20/x
  3. Step 3: Cross multiply
    93,637.20x = 140,164.20 × 90,721.20
  4. Step 4: Simplify right side
    93,637.20x = 12,715,864,421.04
  5. Step 5: Solve for x
    x = 12,715,864,421.04/93,637.20
  6. Step 6: Final answer
    x = 135,799.28

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1.5x scale

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.