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Finding the Fourth Proportional to 78,880.70, 108,869.40 and 46,613.95

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Solution

The fourth proportional to 78,880.70, 108,869.40 and 46,613.95 is: 64,335.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880.70 : 108,869.40 = 46,613.95 : x
  2. Step 2: Convert to fraction form
    78,880.70/108,869.40 = 46,613.95/x
  3. Step 3: Cross multiply
    78,880.70x = 108,869.40 × 46,613.95
  4. Step 4: Simplify right side
    78,880.70x = 5,074,832,495.96
  5. Step 5: Solve for x
    x = 5,074,832,495.96/78,880.70
  6. Step 6: Final answer
    x = 64,335.54

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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.