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Finding the Fourth Proportional to 98,702, 136,208.76 and 53,990.96

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Solution

The fourth proportional to 98,702, 136,208.76 and 53,990.96 is: 74,507.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,702 : 136,208.76 = 53,990.96 : x
  2. Step 2: Convert to fraction form
    98,702/136,208.76 = 53,990.96/x
  3. Step 3: Cross multiply
    98,702x = 136,208.76 × 53,990.96
  4. Step 4: Simplify right side
    98,702x = 7,354,041,712.81
  5. Step 5: Solve for x
    x = 7,354,041,712.81/98,702
  6. Step 6: Final answer
    x = 74,507.52

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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.