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Finding the Fourth Proportional to 268,110.80, 402,220.20 and 78,570.80

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Solution

The fourth proportional to 268,110.80, 402,220.20 and 78,570.80 is: 117,872.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,110.80 : 402,220.20 = 78,570.80 : x
  2. Step 2: Convert to fraction form
    268,110.80/402,220.20 = 78,570.80/x
  3. Step 3: Cross multiply
    268,110.80x = 402,220.20 × 78,570.80
  4. Step 4: Simplify right side
    268,110.80x = 31,602,762,890.16
  5. Step 5: Solve for x
    x = 31,602,762,890.16/268,110.80
  6. Step 6: Final answer
    x = 117,872.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.