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Finding the Fourth Proportional to 66,090.90, 99,115.41 and 21,707.34

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Solution

The fourth proportional to 66,090.90, 99,115.41 and 21,707.34 is: 32,554.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,090.90 : 99,115.41 = 21,707.34 : x
  2. Step 2: Convert to fraction form
    66,090.90/99,115.41 = 21,707.34/x
  3. Step 3: Cross multiply
    66,090.90x = 99,115.41 × 21,707.34
  4. Step 4: Simplify right side
    66,090.90x = 2,151,531,904.11
  5. Step 5: Solve for x
    x = 2,151,531,904.11/66,090.90
  6. Step 6: Final answer
    x = 32,554.13

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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.