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Finding the Fourth Proportional to 53,354.40, 79,929.20 and 31,440.80

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Solution

The fourth proportional to 53,354.40, 79,929.20 and 31,440.80 is: 47,100.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,354.40 : 79,929.20 = 31,440.80 : x
  2. Step 2: Convert to fraction form
    53,354.40/79,929.20 = 31,440.80/x
  3. Step 3: Cross multiply
    53,354.40x = 79,929.20 × 31,440.80
  4. Step 4: Simplify right side
    53,354.40x = 2,513,037,991.36
  5. Step 5: Solve for x
    x = 2,513,037,991.36/53,354.40
  6. Step 6: Final answer
    x = 47,100.86

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1.5x scale

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.