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Finding the Fourth Proportional to 138,352.48, 190,751.76 and 90,530.08

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Solution

The fourth proportional to 138,352.48, 190,751.76 and 90,530.08 is: 124,817.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,352.48 : 190,751.76 = 90,530.08 : x
  2. Step 2: Convert to fraction form
    138,352.48/190,751.76 = 90,530.08/x
  3. Step 3: Cross multiply
    138,352.48x = 190,751.76 × 90,530.08
  4. Step 4: Simplify right side
    138,352.48x = 17,268,772,092.94
  5. Step 5: Solve for x
    x = 17,268,772,092.94/138,352.48
  6. Step 6: Final answer
    x = 124,817.22

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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.