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Finding the Fourth Proportional to 220,712.76, 304,616.40 and 130,039.74

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Solution

The fourth proportional to 220,712.76, 304,616.40 and 130,039.74 is: 179,474.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,712.76 : 304,616.40 = 130,039.74 : x
  2. Step 2: Convert to fraction form
    220,712.76/304,616.40 = 130,039.74/x
  3. Step 3: Cross multiply
    220,712.76x = 304,616.40 × 130,039.74
  4. Step 4: Simplify right side
    220,712.76x = 39,612,237,455.74
  5. Step 5: Solve for x
    x = 39,612,237,455.74/220,712.76
  6. Step 6: Final answer
    x = 179,474.16

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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.