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Finding the Fourth Proportional to 86,823.45, 130,235.18 and 67,140.45

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Solution

The fourth proportional to 86,823.45, 130,235.18 and 67,140.45 is: 100,710.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,823.45 : 130,235.18 = 67,140.45 : x
  2. Step 2: Convert to fraction form
    86,823.45/130,235.18 = 67,140.45/x
  3. Step 3: Cross multiply
    86,823.45x = 130,235.18 × 67,140.45
  4. Step 4: Simplify right side
    86,823.45x = 8,744,048,255.33
  5. Step 5: Solve for x
    x = 8,744,048,255.33/86,823.45
  6. Step 6: Final answer
    x = 100,710.68

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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.