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Finding the Fourth Proportional to 78,683.68, 108,583.96 and 46,853.92

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Solution

The fourth proportional to 78,683.68, 108,583.96 and 46,853.92 is: 64,658.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,683.68 : 108,583.96 = 46,853.92 : x
  2. Step 2: Convert to fraction form
    78,683.68/108,583.96 = 46,853.92/x
  3. Step 3: Cross multiply
    78,683.68x = 108,583.96 × 46,853.92
  4. Step 4: Simplify right side
    78,683.68x = 5,087,584,175.12
  5. Step 5: Solve for x
    x = 5,087,584,175.12/78,683.68
  6. Step 6: Final answer
    x = 64,658.70

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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.