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Finding the Fourth Proportional to 86,892.12, 130,117.59 and 72,815.13

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Solution

The fourth proportional to 86,892.12, 130,117.59 and 72,815.13 is: 109,037.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,892.12 : 130,117.59 = 72,815.13 : x
  2. Step 2: Convert to fraction form
    86,892.12/130,117.59 = 72,815.13/x
  3. Step 3: Cross multiply
    86,892.12x = 130,117.59 × 72,815.13
  4. Step 4: Simplify right side
    86,892.12x = 9,474,529,231.14
  5. Step 5: Solve for x
    x = 9,474,529,231.14/86,892.12
  6. Step 6: Final answer
    x = 109,037.84

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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.