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Finding the Fourth Proportional to 70,253, 105,379.56 and 28,700

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Solution

The fourth proportional to 70,253, 105,379.56 and 28,700 is: 43,050.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,253 : 105,379.56 = 28,700 : x
  2. Step 2: Convert to fraction form
    70,253/105,379.56 = 28,700/x
  3. Step 3: Cross multiply
    70,253x = 105,379.56 × 28,700
  4. Step 4: Simplify right side
    70,253x = 3,024,393,372
  5. Step 5: Solve for x
    x = 3,024,393,372/70,253
  6. Step 6: Final answer
    x = 43,050.02

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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.