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Finding the Fourth Proportional to 218,790.76, 301,931.50 and 118,188.76

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Solution

The fourth proportional to 218,790.76, 301,931.50 and 118,188.76 is: 163,100.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,790.76 : 301,931.50 = 118,188.76 : x
  2. Step 2: Convert to fraction form
    218,790.76/301,931.50 = 118,188.76/x
  3. Step 3: Cross multiply
    218,790.76x = 301,931.50 × 118,188.76
  4. Step 4: Simplify right side
    218,790.76x = 35,684,909,589.94
  5. Step 5: Solve for x
    x = 35,684,909,589.94/218,790.76
  6. Step 6: Final answer
    x = 163,100.62

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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.