Home / 85,505.12-117,996.68-47,779.36

Finding the Fourth Proportional to 85,505.12, 117,996.68 and 47,779.36

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Solution

The fourth proportional to 85,505.12, 117,996.68 and 47,779.36 is: 65,935.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,505.12 : 117,996.68 = 47,779.36 : x
  2. Step 2: Convert to fraction form
    85,505.12/117,996.68 = 47,779.36/x
  3. Step 3: Cross multiply
    85,505.12x = 117,996.68 × 47,779.36
  4. Step 4: Simplify right side
    85,505.12x = 5,637,805,852.52
  5. Step 5: Solve for x
    x = 5,637,805,852.52/85,505.12
  6. Step 6: Final answer
    x = 65,935.30

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1.5x scale

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.