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Finding the Fourth Proportional to 111,011.40, 166,419.90 and 66,655.80

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Solution

The fourth proportional to 111,011.40, 166,419.90 and 66,655.80 is: 99,925.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,011.40 : 166,419.90 = 66,655.80 : x
  2. Step 2: Convert to fraction form
    111,011.40/166,419.90 = 66,655.80/x
  3. Step 3: Cross multiply
    111,011.40x = 166,419.90 × 66,655.80
  4. Step 4: Simplify right side
    111,011.40x = 11,092,851,570.42
  5. Step 5: Solve for x
    x = 11,092,851,570.42/111,011.40
  6. Step 6: Final answer
    x = 99,925.34

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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.