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Finding the Fourth Proportional to 84,720.80, 127,139.60 and 29,316.80

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Solution

The fourth proportional to 84,720.80, 127,139.60 and 29,316.80 is: 43,995.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,720.80 : 127,139.60 = 29,316.80 : x
  2. Step 2: Convert to fraction form
    84,720.80/127,139.60 = 29,316.80/x
  3. Step 3: Cross multiply
    84,720.80x = 127,139.60 × 29,316.80
  4. Step 4: Simplify right side
    84,720.80x = 3,727,326,225.28
  5. Step 5: Solve for x
    x = 3,727,326,225.28/84,720.80
  6. Step 6: Final answer
    x = 43,995.41

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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.