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Finding the Fourth Proportional to 191,295.60, 286,932.33 and 72,978.90

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Solution

The fourth proportional to 191,295.60, 286,932.33 and 72,978.90 is: 109,464.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,295.60 : 286,932.33 = 72,978.90 : x
  2. Step 2: Convert to fraction form
    191,295.60/286,932.33 = 72,978.90/x
  3. Step 3: Cross multiply
    191,295.60x = 286,932.33 × 72,978.90
  4. Step 4: Simplify right side
    191,295.60x = 20,940,005,817.84
  5. Step 5: Solve for x
    x = 20,940,005,817.84/191,295.60
  6. Step 6: Final answer
    x = 109,464.13

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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.