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Finding the Fourth Proportional to 356,558.72, 534,833.95 and 86,688.39

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Solution

The fourth proportional to 356,558.72, 534,833.95 and 86,688.39 is: 130,031.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,558.72 : 534,833.95 = 86,688.39 : x
  2. Step 2: Convert to fraction form
    356,558.72/534,833.95 = 86,688.39/x
  3. Step 3: Cross multiply
    356,558.72x = 534,833.95 × 86,688.39
  4. Step 4: Simplify right side
    356,558.72x = 46,363,894,042.84
  5. Step 5: Solve for x
    x = 46,363,894,042.84/356,558.72
  6. Step 6: Final answer
    x = 130,031.58

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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.