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Finding the Fourth Proportional to 97,687.20, 146,530.80 and 90,688.80

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Solution

The fourth proportional to 97,687.20, 146,530.80 and 90,688.80 is: 136,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,687.20 : 146,530.80 = 90,688.80 : x
  2. Step 2: Convert to fraction form
    97,687.20/146,530.80 = 90,688.80/x
  3. Step 3: Cross multiply
    97,687.20x = 146,530.80 × 90,688.80
  4. Step 4: Simplify right side
    97,687.20x = 13,288,702,415.04
  5. Step 5: Solve for x
    x = 13,288,702,415.04/97,687.20
  6. Step 6: Final answer
    x = 136,033.20

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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.