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Finding the Fourth Proportional to 52,700.77, 72,728.15 and 28,828.99

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Solution

The fourth proportional to 52,700.77, 72,728.15 and 28,828.99 is: 39,784.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,700.77 : 72,728.15 = 28,828.99 : x
  2. Step 2: Convert to fraction form
    52,700.77/72,728.15 = 28,828.99/x
  3. Step 3: Cross multiply
    52,700.77x = 72,728.15 × 28,828.99
  4. Step 4: Simplify right side
    52,700.77x = 2,096,679,109.07
  5. Step 5: Solve for x
    x = 2,096,679,109.07/52,700.77
  6. Step 6: Final answer
    x = 39,784.60

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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.