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Finding the Fourth Proportional to 86,684.30, 130,026.45 and 73,999.70

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Solution

The fourth proportional to 86,684.30, 130,026.45 and 73,999.70 is: 110,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,684.30 : 130,026.45 = 73,999.70 : x
  2. Step 2: Convert to fraction form
    86,684.30/130,026.45 = 73,999.70/x
  3. Step 3: Cross multiply
    86,684.30x = 130,026.45 × 73,999.70
  4. Step 4: Simplify right side
    86,684.30x = 9,621,918,292.07
  5. Step 5: Solve for x
    x = 9,621,918,292.07/86,684.30
  6. Step 6: Final answer
    x = 110,999.55

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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.