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Finding the Fourth Proportional to 72,497.56, 108,746.10 and 19,907.08

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Solution

The fourth proportional to 72,497.56, 108,746.10 and 19,907.08 is: 29,860.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,497.56 : 108,746.10 = 19,907.08 : x
  2. Step 2: Convert to fraction form
    72,497.56/108,746.10 = 19,907.08/x
  3. Step 3: Cross multiply
    72,497.56x = 108,746.10 × 19,907.08
  4. Step 4: Simplify right side
    72,497.56x = 2,164,817,312.39
  5. Step 5: Solve for x
    x = 2,164,817,312.39/72,497.56
  6. Step 6: Final answer
    x = 29,860.55

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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.