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Finding the Fourth Proportional to 124,718.70, 172,109 and 68,130.30

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Solution

The fourth proportional to 124,718.70, 172,109 and 68,130.30 is: 94,018.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,718.70 : 172,109 = 68,130.30 : x
  2. Step 2: Convert to fraction form
    124,718.70/172,109 = 68,130.30/x
  3. Step 3: Cross multiply
    124,718.70x = 172,109 × 68,130.30
  4. Step 4: Simplify right side
    124,718.70x = 11,725,837,802.70
  5. Step 5: Solve for x
    x = 11,725,837,802.70/124,718.70
  6. Step 6: Final answer
    x = 94,018.28

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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.