Home / 286,521.78-429,782.20-76,159.72

Finding the Fourth Proportional to 286,521.78, 429,782.20 and 76,159.72

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Solution

The fourth proportional to 286,521.78, 429,782.20 and 76,159.72 is: 114,239.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,521.78 : 429,782.20 = 76,159.72 : x
  2. Step 2: Convert to fraction form
    286,521.78/429,782.20 = 76,159.72/x
  3. Step 3: Cross multiply
    286,521.78x = 429,782.20 × 76,159.72
  4. Step 4: Simplify right side
    286,521.78x = 32,732,092,012.98
  5. Step 5: Solve for x
    x = 32,732,092,012.98/286,521.78
  6. Step 6: Final answer
    x = 114,239.46

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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.