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Finding the Fourth Proportional to 218,775.58, 301,908.50 and 121,978.28

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Solution

The fourth proportional to 218,775.58, 301,908.50 and 121,978.28 is: 168,329.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,775.58 : 301,908.50 = 121,978.28 : x
  2. Step 2: Convert to fraction form
    218,775.58/301,908.50 = 121,978.28/x
  3. Step 3: Cross multiply
    218,775.58x = 301,908.50 × 121,978.28
  4. Step 4: Simplify right side
    218,775.58x = 36,826,280,607.10
  5. Step 5: Solve for x
    x = 36,826,280,607.10/218,775.58
  6. Step 6: Final answer
    x = 168,329.03

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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.