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Finding the Fourth Proportional to 86,820.20, 130,230.30 and 72,823.40

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Solution

The fourth proportional to 86,820.20, 130,230.30 and 72,823.40 is: 109,235.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,820.20 : 130,230.30 = 72,823.40 : x
  2. Step 2: Convert to fraction form
    86,820.20/130,230.30 = 72,823.40/x
  3. Step 3: Cross multiply
    86,820.20x = 130,230.30 × 72,823.40
  4. Step 4: Simplify right side
    86,820.20x = 9,483,813,229.02
  5. Step 5: Solve for x
    x = 9,483,813,229.02/86,820.20
  6. Step 6: Final answer
    x = 109,235.10

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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.