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Finding the Fourth Proportional to 98,121.20, 147,181.80 and 90,904.10

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Solution

The fourth proportional to 98,121.20, 147,181.80 and 90,904.10 is: 136,356.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,121.20 : 147,181.80 = 90,904.10 : x
  2. Step 2: Convert to fraction form
    98,121.20/147,181.80 = 90,904.10/x
  3. Step 3: Cross multiply
    98,121.20x = 147,181.80 × 90,904.10
  4. Step 4: Simplify right side
    98,121.20x = 13,379,429,065.38
  5. Step 5: Solve for x
    x = 13,379,429,065.38/98,121.20
  6. Step 6: Final answer
    x = 136,356.15

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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.