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Finding the Fourth Proportional to 99,658.60, 149,196.30 and 66,416.20

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Solution

The fourth proportional to 99,658.60, 149,196.30 and 66,416.20 is: 99,429.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,658.60 : 149,196.30 = 66,416.20 : x
  2. Step 2: Convert to fraction form
    99,658.60/149,196.30 = 66,416.20/x
  3. Step 3: Cross multiply
    99,658.60x = 149,196.30 × 66,416.20
  4. Step 4: Simplify right side
    99,658.60x = 9,909,051,300.06
  5. Step 5: Solve for x
    x = 9,909,051,300.06/99,658.60
  6. Step 6: Final answer
    x = 99,429.97

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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.