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Finding the Fourth Proportional to 84,830.30, 127,245.45 and 77,054.30

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Solution

The fourth proportional to 84,830.30, 127,245.45 and 77,054.30 is: 115,581.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,830.30 : 127,245.45 = 77,054.30 : x
  2. Step 2: Convert to fraction form
    84,830.30/127,245.45 = 77,054.30/x
  3. Step 3: Cross multiply
    84,830.30x = 127,245.45 × 77,054.30
  4. Step 4: Simplify right side
    84,830.30x = 9,804,809,077.94
  5. Step 5: Solve for x
    x = 9,804,809,077.94/84,830.30
  6. Step 6: Final answer
    x = 115,581.45

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Similar ratio
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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.