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Finding the Fourth Proportional to 218,782.62, 301,947.51 and 128,173.17

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Solution

The fourth proportional to 218,782.62, 301,947.51 and 128,173.17 is: 176,895.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,782.62 : 301,947.51 = 128,173.17 : x
  2. Step 2: Convert to fraction form
    218,782.62/301,947.51 = 128,173.17/x
  3. Step 3: Cross multiply
    218,782.62x = 301,947.51 × 128,173.17
  4. Step 4: Simplify right side
    218,782.62x = 38,701,569,530.31
  5. Step 5: Solve for x
    x = 38,701,569,530.31/218,782.62
  6. Step 6: Final answer
    x = 176,895.08

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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.