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Finding the Fourth Proportional to 72,654.36, 108,778.53 and 39,254.76

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Solution

The fourth proportional to 72,654.36, 108,778.53 and 39,254.76 is: 58,772.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,654.36 : 108,778.53 = 39,254.76 : x
  2. Step 2: Convert to fraction form
    72,654.36/108,778.53 = 39,254.76/x
  3. Step 3: Cross multiply
    72,654.36x = 108,778.53 × 39,254.76
  4. Step 4: Simplify right side
    72,654.36x = 4,270,075,088.30
  5. Step 5: Solve for x
    x = 4,270,075,088.30/72,654.36
  6. Step 6: Final answer
    x = 58,772.45

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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.