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Finding the Fourth Proportional to 101,386.80, 139,908.11 and 56,062.04

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Solution

The fourth proportional to 101,386.80, 139,908.11 and 56,062.04 is: 77,362.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,386.80 : 139,908.11 = 56,062.04 : x
  2. Step 2: Convert to fraction form
    101,386.80/139,908.11 = 56,062.04/x
  3. Step 3: Cross multiply
    101,386.80x = 139,908.11 × 56,062.04
  4. Step 4: Simplify right side
    101,386.80x = 7,843,533,079.29
  5. Step 5: Solve for x
    x = 7,843,533,079.29/101,386.80
  6. Step 6: Final answer
    x = 77,362.47

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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.