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Finding the Fourth Proportional to 139,547.31, 192,630.07 and 98,923.77

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Solution

The fourth proportional to 139,547.31, 192,630.07 and 98,923.77 is: 136,553.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,547.31 : 192,630.07 = 98,923.77 : x
  2. Step 2: Convert to fraction form
    139,547.31/192,630.07 = 98,923.77/x
  3. Step 3: Cross multiply
    139,547.31x = 192,630.07 × 98,923.77
  4. Step 4: Simplify right side
    139,547.31x = 19,055,692,739.76
  5. Step 5: Solve for x
    x = 19,055,692,739.76/139,547.31
  6. Step 6: Final answer
    x = 136,553.64

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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.