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Finding the Fourth Proportional to 218,790.88, 301,931.68 and 118,188.88

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Solution

The fourth proportional to 218,790.88, 301,931.68 and 118,188.88 is: 163,100.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,790.88 : 301,931.68 = 118,188.88 : x
  2. Step 2: Convert to fraction form
    218,790.88/301,931.68 = 118,188.88/x
  3. Step 3: Cross multiply
    218,790.88x = 301,931.68 × 118,188.88
  4. Step 4: Simplify right side
    218,790.88x = 35,684,967,095.72
  5. Step 5: Solve for x
    x = 35,684,967,095.72/218,790.88
  6. Step 6: Final answer
    x = 163,100.80

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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.