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Finding the Fourth Proportional to 101,121.80, 139,547.16 and 55,800.20

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Solution

The fourth proportional to 101,121.80, 139,547.16 and 55,800.20 is: 77,003.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,121.80 : 139,547.16 = 55,800.20 : x
  2. Step 2: Convert to fraction form
    101,121.80/139,547.16 = 55,800.20/x
  3. Step 3: Cross multiply
    101,121.80x = 139,547.16 × 55,800.20
  4. Step 4: Simplify right side
    101,121.80x = 7,786,759,437.43
  5. Step 5: Solve for x
    x = 7,786,759,437.43/101,121.80
  6. Step 6: Final answer
    x = 77,003.77

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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.