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Finding the Fourth Proportional to 58,714.80, 80,899.40 and 39,819.12

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Solution

The fourth proportional to 58,714.80, 80,899.40 and 39,819.12 is: 54,864.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,714.80 : 80,899.40 = 39,819.12 : x
  2. Step 2: Convert to fraction form
    58,714.80/80,899.40 = 39,819.12/x
  3. Step 3: Cross multiply
    58,714.80x = 80,899.40 × 39,819.12
  4. Step 4: Simplify right side
    58,714.80x = 3,221,342,916.53
  5. Step 5: Solve for x
    x = 3,221,342,916.53/58,714.80
  6. Step 6: Final answer
    x = 54,864.24

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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.