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Finding the Fourth Proportional to 123,859.51, 170,930.16 and 70,143.37

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Solution

The fourth proportional to 123,859.51, 170,930.16 and 70,143.37 is: 96,800.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,859.51 : 170,930.16 = 70,143.37 : x
  2. Step 2: Convert to fraction form
    123,859.51/170,930.16 = 70,143.37/x
  3. Step 3: Cross multiply
    123,859.51x = 170,930.16 × 70,143.37
  4. Step 4: Simplify right side
    123,859.51x = 11,989,617,457.04
  5. Step 5: Solve for x
    x = 11,989,617,457.04/123,859.51
  6. Step 6: Final answer
    x = 96,800.14

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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.