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Finding the Fourth Proportional to 117,901.81, 162,707.91 and 64,187.74

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Solution

The fourth proportional to 117,901.81, 162,707.91 and 64,187.74 is: 88,580.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,901.81 : 162,707.91 = 64,187.74 : x
  2. Step 2: Convert to fraction form
    117,901.81/162,707.91 = 64,187.74/x
  3. Step 3: Cross multiply
    117,901.81x = 162,707.91 × 64,187.74
  4. Step 4: Simplify right side
    117,901.81x = 10,443,852,985.70
  5. Step 5: Solve for x
    x = 10,443,852,985.70/117,901.81
  6. Step 6: Final answer
    x = 88,580.94

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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.