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Finding the Fourth Proportional to 61,140, 84,514.44 and 51,009.36

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Solution

The fourth proportional to 61,140, 84,514.44 and 51,009.36 is: 70,510.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,140 : 84,514.44 = 51,009.36 : x
  2. Step 2: Convert to fraction form
    61,140/84,514.44 = 51,009.36/x
  3. Step 3: Cross multiply
    61,140x = 84,514.44 × 51,009.36
  4. Step 4: Simplify right side
    61,140x = 4,311,027,495.16
  5. Step 5: Solve for x
    x = 4,311,027,495.16/61,140
  6. Step 6: Final answer
    x = 70,510.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.