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Finding the Fourth Proportional to 86,952.70, 130,429.05 and 42,556.60

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Solution

The fourth proportional to 86,952.70, 130,429.05 and 42,556.60 is: 63,834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,952.70 : 130,429.05 = 42,556.60 : x
  2. Step 2: Convert to fraction form
    86,952.70/130,429.05 = 42,556.60/x
  3. Step 3: Cross multiply
    86,952.70x = 130,429.05 × 42,556.60
  4. Step 4: Simplify right side
    86,952.70x = 5,550,616,909.23
  5. Step 5: Solve for x
    x = 5,550,616,909.23/86,952.70
  6. Step 6: Final answer
    x = 63,834.90

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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.