Home / 86,025.60-128,995.20-39,225.60

Finding the Fourth Proportional to 86,025.60, 128,995.20 and 39,225.60

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Solution

The fourth proportional to 86,025.60, 128,995.20 and 39,225.60 is: 58,818.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,025.60 : 128,995.20 = 39,225.60 : x
  2. Step 2: Convert to fraction form
    86,025.60/128,995.20 = 39,225.60/x
  3. Step 3: Cross multiply
    86,025.60x = 128,995.20 × 39,225.60
  4. Step 4: Simplify right side
    86,025.60x = 5,059,914,117.12
  5. Step 5: Solve for x
    x = 5,059,914,117.12/86,025.60
  6. Step 6: Final answer
    x = 58,818.70

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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.