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Finding the Fourth Proportional to 84,798.72, 117,016.38 and 47,070

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Solution

The fourth proportional to 84,798.72, 117,016.38 and 47,070 is: 64,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,798.72 : 117,016.38 = 47,070 : x
  2. Step 2: Convert to fraction form
    84,798.72/117,016.38 = 47,070/x
  3. Step 3: Cross multiply
    84,798.72x = 117,016.38 × 47,070
  4. Step 4: Simplify right side
    84,798.72x = 5,507,961,006.60
  5. Step 5: Solve for x
    x = 5,507,961,006.60/84,798.72
  6. Step 6: Final answer
    x = 64,953.35

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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.