Home / 287,582.20-431,420.84-129,807.16

Finding the Fourth Proportional to 287,582.20, 431,420.84 and 129,807.16

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Solution

The fourth proportional to 287,582.20, 431,420.84 and 129,807.16 is: 194,732.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,582.20 : 431,420.84 = 129,807.16 : x
  2. Step 2: Convert to fraction form
    287,582.20/431,420.84 = 129,807.16/x
  3. Step 3: Cross multiply
    287,582.20x = 431,420.84 × 129,807.16
  4. Step 4: Simplify right side
    287,582.20x = 56,001,514,005.21
  5. Step 5: Solve for x
    x = 56,001,514,005.21/287,582.20
  6. Step 6: Final answer
    x = 194,732.20

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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.