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Finding the Fourth Proportional to 118,704.99, 163,813.05 and 64,990.38

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Solution

The fourth proportional to 118,704.99, 163,813.05 and 64,990.38 is: 89,686.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,704.99 : 163,813.05 = 64,990.38 : x
  2. Step 2: Convert to fraction form
    118,704.99/163,813.05 = 64,990.38/x
  3. Step 3: Cross multiply
    118,704.99x = 163,813.05 × 64,990.38
  4. Step 4: Simplify right side
    118,704.99x = 10,646,272,368.46
  5. Step 5: Solve for x
    x = 10,646,272,368.46/118,704.99
  6. Step 6: Final answer
    x = 89,686.81

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1.5x scale

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.