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Finding the Fourth Proportional to 57,307.80, 79,080.80 and 31,812.16

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Solution

The fourth proportional to 57,307.80, 79,080.80 and 31,812.16 is: 43,898.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,307.80 : 79,080.80 = 31,812.16 : x
  2. Step 2: Convert to fraction form
    57,307.80/79,080.80 = 31,812.16/x
  3. Step 3: Cross multiply
    57,307.80x = 79,080.80 × 31,812.16
  4. Step 4: Simplify right side
    57,307.80x = 2,515,731,062.53
  5. Step 5: Solve for x
    x = 2,515,731,062.53/57,307.80
  6. Step 6: Final answer
    x = 43,898.58

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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.