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Finding the Fourth Proportional to 218,281.35, 301,219.42 and 121,482.47

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Solution

The fourth proportional to 218,281.35, 301,219.42 and 121,482.47 is: 167,640.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,281.35 : 301,219.42 = 121,482.47 : x
  2. Step 2: Convert to fraction form
    218,281.35/301,219.42 = 121,482.47/x
  3. Step 3: Cross multiply
    218,281.35x = 301,219.42 × 121,482.47
  4. Step 4: Simplify right side
    218,281.35x = 36,592,879,225.13
  5. Step 5: Solve for x
    x = 36,592,879,225.13/218,281.35
  6. Step 6: Final answer
    x = 167,640.89

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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.