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Finding the Fourth Proportional to 144,039.30, 215,875.35 and 80,859.30

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Solution

The fourth proportional to 144,039.30, 215,875.35 and 80,859.30 is: 121,185.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,039.30 : 215,875.35 = 80,859.30 : x
  2. Step 2: Convert to fraction form
    144,039.30/215,875.35 = 80,859.30/x
  3. Step 3: Cross multiply
    144,039.30x = 215,875.35 × 80,859.30
  4. Step 4: Simplify right side
    144,039.30x = 17,455,529,688.26
  5. Step 5: Solve for x
    x = 17,455,529,688.26/144,039.30
  6. Step 6: Final answer
    x = 121,185.88

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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.