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Finding the Fourth Proportional to 84,678.82, 127,018.45 and 28,558.35

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Solution

The fourth proportional to 84,678.82, 127,018.45 and 28,558.35 is: 42,837.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,678.82 : 127,018.45 = 28,558.35 : x
  2. Step 2: Convert to fraction form
    84,678.82/127,018.45 = 28,558.35/x
  3. Step 3: Cross multiply
    84,678.82x = 127,018.45 × 28,558.35
  4. Step 4: Simplify right side
    84,678.82x = 3,627,437,713.18
  5. Step 5: Solve for x
    x = 3,627,437,713.18/84,678.82
  6. Step 6: Final answer
    x = 42,837.60

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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.