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Finding the Fourth Proportional to 52,001.20, 78,001.80 and 39,713.20

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Solution

The fourth proportional to 52,001.20, 78,001.80 and 39,713.20 is: 59,569.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,001.20 : 78,001.80 = 39,713.20 : x
  2. Step 2: Convert to fraction form
    52,001.20/78,001.80 = 39,713.20/x
  3. Step 3: Cross multiply
    52,001.20x = 78,001.80 × 39,713.20
  4. Step 4: Simplify right side
    52,001.20x = 3,097,701,083.76
  5. Step 5: Solve for x
    x = 3,097,701,083.76/52,001.20
  6. Step 6: Final answer
    x = 59,569.80

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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.