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Finding the Fourth Proportional to 86,025.68, 128,975.60 and 57,875.75

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Solution

The fourth proportional to 86,025.68, 128,975.60 and 57,875.75 is: 86,771.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,025.68 : 128,975.60 = 57,875.75 : x
  2. Step 2: Convert to fraction form
    86,025.68/128,975.60 = 57,875.75/x
  3. Step 3: Cross multiply
    86,025.68x = 128,975.60 × 57,875.75
  4. Step 4: Simplify right side
    86,025.68x = 7,464,559,081.51
  5. Step 5: Solve for x
    x = 7,464,559,081.51/86,025.68
  6. Step 6: Final answer
    x = 86,771.29

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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.