Home / 260,000.57-390,059.19-86,905.31

Finding the Fourth Proportional to 260,000.57, 390,059.19 and 86,905.31

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Solution

The fourth proportional to 260,000.57, 390,059.19 and 86,905.31 is: 130,377.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,000.57 : 390,059.19 = 86,905.31 : x
  2. Step 2: Convert to fraction form
    260,000.57/390,059.19 = 86,905.31/x
  3. Step 3: Cross multiply
    260,000.57x = 390,059.19 × 86,905.31
  4. Step 4: Simplify right side
    260,000.57x = 33,898,212,875.00
  5. Step 5: Solve for x
    x = 33,898,212,875.00/260,000.57
  6. Step 6: Final answer
    x = 130,377.45

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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.