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Finding the Fourth Proportional to 218,671.71, 301,776.15 and 121,875.61

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Solution

The fourth proportional to 218,671.71, 301,776.15 and 121,875.61 is: 168,193.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,671.71 : 301,776.15 = 121,875.61 : x
  2. Step 2: Convert to fraction form
    218,671.71/301,776.15 = 121,875.61/x
  3. Step 3: Cross multiply
    218,671.71x = 301,776.15 × 121,875.61
  4. Step 4: Simplify right side
    218,671.71x = 36,779,152,364.70
  5. Step 5: Solve for x
    x = 36,779,152,364.70/218,671.71
  6. Step 6: Final answer
    x = 168,193.46

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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.