Home / 430,648.19-645,972.29-131,128.77

Finding the Fourth Proportional to 430,648.19, 645,972.29 and 131,128.77

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Solution

The fourth proportional to 430,648.19, 645,972.29 and 131,128.77 is: 196,693.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,648.19 : 645,972.29 = 131,128.77 : x
  2. Step 2: Convert to fraction form
    430,648.19/645,972.29 = 131,128.77/x
  3. Step 3: Cross multiply
    430,648.19x = 645,972.29 × 131,128.77
  4. Step 4: Simplify right side
    430,648.19x = 84,705,553,929.47
  5. Step 5: Solve for x
    x = 84,705,553,929.47/430,648.19
  6. Step 6: Final answer
    x = 196,693.16

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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.