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Finding the Fourth Proportional to 99,637.20, 149,455.80 and 36,457.20

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Solution

The fourth proportional to 99,637.20, 149,455.80 and 36,457.20 is: 54,685.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,637.20 : 149,455.80 = 36,457.20 : x
  2. Step 2: Convert to fraction form
    99,637.20/149,455.80 = 36,457.20/x
  3. Step 3: Cross multiply
    99,637.20x = 149,455.80 × 36,457.20
  4. Step 4: Simplify right side
    99,637.20x = 5,448,739,991.76
  5. Step 5: Solve for x
    x = 5,448,739,991.76/99,637.20
  6. Step 6: Final answer
    x = 54,685.80

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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.