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Finding the Fourth Proportional to 135,069.06, 186,394.59 and 74,643.90

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Solution

The fourth proportional to 135,069.06, 186,394.59 and 74,643.90 is: 103,008.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,069.06 : 186,394.59 = 74,643.90 : x
  2. Step 2: Convert to fraction form
    135,069.06/186,394.59 = 74,643.90/x
  3. Step 3: Cross multiply
    135,069.06x = 186,394.59 × 74,643.90
  4. Step 4: Simplify right side
    135,069.06x = 13,913,219,136.50
  5. Step 5: Solve for x
    x = 13,913,219,136.50/135,069.06
  6. Step 6: Final answer
    x = 103,008.19

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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.