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Finding the Fourth Proportional to 98,975.53, 147,788.03 and 78,758.08

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Solution

The fourth proportional to 98,975.53, 147,788.03 and 78,758.08 is: 117,599.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,975.53 : 147,788.03 = 78,758.08 : x
  2. Step 2: Convert to fraction form
    98,975.53/147,788.03 = 78,758.08/x
  3. Step 3: Cross multiply
    98,975.53x = 147,788.03 × 78,758.08
  4. Step 4: Simplify right side
    98,975.53x = 11,639,502,494.78
  5. Step 5: Solve for x
    x = 11,639,502,494.78/98,975.53
  6. Step 6: Final answer
    x = 117,599.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.