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Finding the Fourth Proportional to 98,136, 135,443.04 and 58,415.04

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Solution

The fourth proportional to 98,136, 135,443.04 and 58,415.04 is: 80,621.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,136 : 135,443.04 = 58,415.04 : x
  2. Step 2: Convert to fraction form
    98,136/135,443.04 = 58,415.04/x
  3. Step 3: Cross multiply
    98,136x = 135,443.04 × 58,415.04
  4. Step 4: Simplify right side
    98,136x = 7,911,910,599.32
  5. Step 5: Solve for x
    x = 7,911,910,599.32/98,136
  6. Step 6: Final answer
    x = 80,621.90

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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.