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Finding the Fourth Proportional to 98,981.92, 136,559.25 and 65,008.81

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Solution

The fourth proportional to 98,981.92, 136,559.25 and 65,008.81 is: 89,688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,981.92 : 136,559.25 = 65,008.81 : x
  2. Step 2: Convert to fraction form
    98,981.92/136,559.25 = 65,008.81/x
  3. Step 3: Cross multiply
    98,981.92x = 136,559.25 × 65,008.81
  4. Step 4: Simplify right side
    98,981.92x = 8,877,554,336.99
  5. Step 5: Solve for x
    x = 8,877,554,336.99/98,981.92
  6. Step 6: Final answer
    x = 89,688.65

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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.