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Finding the Fourth Proportional to 101,402.28, 139,888.62 and 65,603.93

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Solution

The fourth proportional to 101,402.28, 139,888.62 and 65,603.93 is: 90,503.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,402.28 : 139,888.62 = 65,603.93 : x
  2. Step 2: Convert to fraction form
    101,402.28/139,888.62 = 65,603.93/x
  3. Step 3: Cross multiply
    101,402.28x = 139,888.62 × 65,603.93
  4. Step 4: Simplify right side
    101,402.28x = 9,177,242,534.83
  5. Step 5: Solve for x
    x = 9,177,242,534.83/101,402.28
  6. Step 6: Final answer
    x = 90,503.32

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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.