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Finding the Fourth Proportional to 53,117.60, 79,719.60 and 51,389.60

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Solution

The fourth proportional to 53,117.60, 79,719.60 and 51,389.60 is: 77,126.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,117.60 : 79,719.60 = 51,389.60 : x
  2. Step 2: Convert to fraction form
    53,117.60/79,719.60 = 51,389.60/x
  3. Step 3: Cross multiply
    53,117.60x = 79,719.60 × 51,389.60
  4. Step 4: Simplify right side
    53,117.60x = 4,096,758,356.16
  5. Step 5: Solve for x
    x = 4,096,758,356.16/53,117.60
  6. Step 6: Final answer
    x = 77,126.19

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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.