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Finding the Fourth Proportional to 135,363.09, 186,802.70 and 74,939.32

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Solution

The fourth proportional to 135,363.09, 186,802.70 and 74,939.32 is: 103,417.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,363.09 : 186,802.70 = 74,939.32 : x
  2. Step 2: Convert to fraction form
    135,363.09/186,802.70 = 74,939.32/x
  3. Step 3: Cross multiply
    135,363.09x = 186,802.70 × 74,939.32
  4. Step 4: Simplify right side
    135,363.09x = 13,998,867,312.16
  5. Step 5: Solve for x
    x = 13,998,867,312.16/135,363.09
  6. Step 6: Final answer
    x = 103,417.17

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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.