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Finding the Fourth Proportional to 81,898.61, 122,877.47 and 28,598.44

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Solution

The fourth proportional to 81,898.61, 122,877.47 and 28,598.44 is: 42,907.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,898.61 : 122,877.47 = 28,598.44 : x
  2. Step 2: Convert to fraction form
    81,898.61/122,877.47 = 28,598.44/x
  3. Step 3: Cross multiply
    81,898.61x = 122,877.47 × 28,598.44
  4. Step 4: Simplify right side
    81,898.61x = 3,514,104,293.44
  5. Step 5: Solve for x
    x = 3,514,104,293.44/81,898.61
  6. Step 6: Final answer
    x = 42,907.98

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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.