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Finding the Fourth Proportional to 64,285, 96,432.36 and 19,916.23

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Solution

The fourth proportional to 64,285, 96,432.36 and 19,916.23 is: 29,875.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,285 : 96,432.36 = 19,916.23 : x
  2. Step 2: Convert to fraction form
    64,285/96,432.36 = 19,916.23/x
  3. Step 3: Cross multiply
    64,285x = 96,432.36 × 19,916.23
  4. Step 4: Simplify right side
    64,285x = 1,920,569,061.20
  5. Step 5: Solve for x
    x = 1,920,569,061.20/64,285
  6. Step 6: Final answer
    x = 29,875.85

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1.5x scale

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.