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Finding the Fourth Proportional to 245,818.80, 368,728.20 and 87,990.30

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Solution

The fourth proportional to 245,818.80, 368,728.20 and 87,990.30 is: 131,985.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,818.80 : 368,728.20 = 87,990.30 : x
  2. Step 2: Convert to fraction form
    245,818.80/368,728.20 = 87,990.30/x
  3. Step 3: Cross multiply
    245,818.80x = 368,728.20 × 87,990.30
  4. Step 4: Simplify right side
    245,818.80x = 32,444,504,936.46
  5. Step 5: Solve for x
    x = 32,444,504,936.46/245,818.80
  6. Step 6: Final answer
    x = 131,985.45

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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.