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Finding the Fourth Proportional to 145,779.40, 201,179.46 and 82,113.40

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Solution

The fourth proportional to 145,779.40, 201,179.46 and 82,113.40 is: 113,318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,779.40 : 201,179.46 = 82,113.40 : x
  2. Step 2: Convert to fraction form
    145,779.40/201,179.46 = 82,113.40/x
  3. Step 3: Cross multiply
    145,779.40x = 201,179.46 × 82,113.40
  4. Step 4: Simplify right side
    145,779.40x = 16,519,529,470.76
  5. Step 5: Solve for x
    x = 16,519,529,470.76/145,779.40
  6. Step 6: Final answer
    x = 113,318.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.