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Finding the Fourth Proportional to 124,725, 172,124.28 and 68,140.08

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Solution

The fourth proportional to 124,725, 172,124.28 and 68,140.08 is: 94,035.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,725 : 172,124.28 = 68,140.08 : x
  2. Step 2: Convert to fraction form
    124,725/172,124.28 = 68,140.08/x
  3. Step 3: Cross multiply
    124,725x = 172,124.28 × 68,140.08
  4. Step 4: Simplify right side
    124,725x = 11,728,562,209.14
  5. Step 5: Solve for x
    x = 11,728,562,209.14/124,725
  6. Step 6: Final answer
    x = 94,035.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.