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Finding the Fourth Proportional to 145,143.95, 217,729.67 and 56,404.30

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Solution

The fourth proportional to 145,143.95, 217,729.67 and 56,404.30 is: 84,611.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,143.95 : 217,729.67 = 56,404.30 : x
  2. Step 2: Convert to fraction form
    145,143.95/217,729.67 = 56,404.30/x
  3. Step 3: Cross multiply
    145,143.95x = 217,729.67 × 56,404.30
  4. Step 4: Simplify right side
    145,143.95x = 12,280,888,799.24
  5. Step 5: Solve for x
    x = 12,280,888,799.24/145,143.95
  6. Step 6: Final answer
    x = 84,611.79

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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.