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Finding the Fourth Proportional to 53,114.60, 79,715.10 and 51,386.60

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Solution

The fourth proportional to 53,114.60, 79,715.10 and 51,386.60 is: 77,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,114.60 : 79,715.10 = 51,386.60 : x
  2. Step 2: Convert to fraction form
    53,114.60/79,715.10 = 51,386.60/x
  3. Step 3: Cross multiply
    53,114.60x = 79,715.10 × 51,386.60
  4. Step 4: Simplify right side
    53,114.60x = 4,096,287,957.66
  5. Step 5: Solve for x
    x = 4,096,287,957.66/53,114.60
  6. Step 6: Final answer
    x = 77,121.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.