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Finding the Fourth Proportional to 140,655.55, 210,990.12 and 45,885.55

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Solution

The fourth proportional to 140,655.55, 210,990.12 and 45,885.55 is: 68,830.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,655.55 : 210,990.12 = 45,885.55 : x
  2. Step 2: Convert to fraction form
    140,655.55/210,990.12 = 45,885.55/x
  3. Step 3: Cross multiply
    140,655.55x = 210,990.12 × 45,885.55
  4. Step 4: Simplify right side
    140,655.55x = 9,681,397,173.29
  5. Step 5: Solve for x
    x = 9,681,397,173.29/140,655.55
  6. Step 6: Final answer
    x = 68,830.54

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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.