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Finding the Fourth Proportional to 57,312.92, 79,090.80 and 31,819.34

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Solution

The fourth proportional to 57,312.92, 79,090.80 and 31,819.34 is: 43,910.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,312.92 : 79,090.80 = 31,819.34 : x
  2. Step 2: Convert to fraction form
    57,312.92/79,090.80 = 31,819.34/x
  3. Step 3: Cross multiply
    57,312.92x = 79,090.80 × 31,819.34
  4. Step 4: Simplify right side
    57,312.92x = 2,516,617,056.07
  5. Step 5: Solve for x
    x = 2,516,617,056.07/57,312.92
  6. Step 6: Final answer
    x = 43,910.12

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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.