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Finding the Fourth Proportional to 55,579.68, 76,699.80 and 30,429

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Solution

The fourth proportional to 55,579.68, 76,699.80 and 30,429 is: 41,991.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,579.68 : 76,699.80 = 30,429 : x
  2. Step 2: Convert to fraction form
    55,579.68/76,699.80 = 30,429/x
  3. Step 3: Cross multiply
    55,579.68x = 76,699.80 × 30,429
  4. Step 4: Simplify right side
    55,579.68x = 2,333,898,214.20
  5. Step 5: Solve for x
    x = 2,333,898,214.20/55,579.68
  6. Step 6: Final answer
    x = 41,991.93

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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.