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Finding the Fourth Proportional to 120,005.90, 165,607.10 and 66,294.68

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Solution

The fourth proportional to 120,005.90, 165,607.10 and 66,294.68 is: 91,486.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,005.90 : 165,607.10 = 66,294.68 : x
  2. Step 2: Convert to fraction form
    120,005.90/165,607.10 = 66,294.68/x
  3. Step 3: Cross multiply
    120,005.90x = 165,607.10 × 66,294.68
  4. Step 4: Simplify right side
    120,005.90x = 10,978,869,700.23
  5. Step 5: Solve for x
    x = 10,978,869,700.23/120,005.90
  6. Step 6: Final answer
    x = 91,486.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.