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Finding the Fourth Proportional to 101,751.51, 140,407.08 and 56,428.71

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Solution

The fourth proportional to 101,751.51, 140,407.08 and 56,428.71 is: 77,866.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,751.51 : 140,407.08 = 56,428.71 : x
  2. Step 2: Convert to fraction form
    101,751.51/140,407.08 = 56,428.71/x
  3. Step 3: Cross multiply
    101,751.51x = 140,407.08 × 56,428.71
  4. Step 4: Simplify right side
    101,751.51x = 7,922,989,838.30
  5. Step 5: Solve for x
    x = 7,922,989,838.30/101,751.51
  6. Step 6: Final answer
    x = 77,866.06

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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.