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Finding the Fourth Proportional to 172,437.80, 258,656.70 and 72,710.60

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Solution

The fourth proportional to 172,437.80, 258,656.70 and 72,710.60 is: 109,065.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,437.80 : 258,656.70 = 72,710.60 : x
  2. Step 2: Convert to fraction form
    172,437.80/258,656.70 = 72,710.60/x
  3. Step 3: Cross multiply
    172,437.80x = 258,656.70 × 72,710.60
  4. Step 4: Simplify right side
    172,437.80x = 18,807,083,851.02
  5. Step 5: Solve for x
    x = 18,807,083,851.02/172,437.80
  6. Step 6: Final answer
    x = 109,065.90

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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.