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Finding the Fourth Proportional to 86,798.40, 130,240.80 and 34,209.60

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Solution

The fourth proportional to 86,798.40, 130,240.80 and 34,209.60 is: 51,331.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,798.40 : 130,240.80 = 34,209.60 : x
  2. Step 2: Convert to fraction form
    86,798.40/130,240.80 = 34,209.60/x
  3. Step 3: Cross multiply
    86,798.40x = 130,240.80 × 34,209.60
  4. Step 4: Simplify right side
    86,798.40x = 4,455,485,671.68
  5. Step 5: Solve for x
    x = 4,455,485,671.68/86,798.40
  6. Step 6: Final answer
    x = 51,331.43

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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.