Home / 286,905.12-430,380.72-87,243.36

Finding the Fourth Proportional to 286,905.12, 430,380.72 and 87,243.36

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Solution

The fourth proportional to 286,905.12, 430,380.72 and 87,243.36 is: 130,872.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,905.12 : 430,380.72 = 87,243.36 : x
  2. Step 2: Convert to fraction form
    286,905.12/430,380.72 = 87,243.36/x
  3. Step 3: Cross multiply
    286,905.12x = 430,380.72 × 87,243.36
  4. Step 4: Simplify right side
    286,905.12x = 37,547,860,092.02
  5. Step 5: Solve for x
    x = 37,547,860,092.02/286,905.12
  6. Step 6: Final answer
    x = 130,872.05

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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.