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Finding the Fourth Proportional to 86,020.80, 128,858.40 and 58,027.20

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Solution

The fourth proportional to 86,020.80, 128,858.40 and 58,027.20 is: 86,924.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,020.80 : 128,858.40 = 58,027.20 : x
  2. Step 2: Convert to fraction form
    86,020.80/128,858.40 = 58,027.20/x
  3. Step 3: Cross multiply
    86,020.80x = 128,858.40 × 58,027.20
  4. Step 4: Simplify right side
    86,020.80x = 7,477,292,148.48
  5. Step 5: Solve for x
    x = 7,477,292,148.48/86,020.80
  6. Step 6: Final answer
    x = 86,924.23

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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.