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Finding the Fourth Proportional to 98,752.61, 148,128.92 and 54,356.51

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Solution

The fourth proportional to 98,752.61, 148,128.92 and 54,356.51 is: 81,534.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,752.61 : 148,128.92 = 54,356.51 : x
  2. Step 2: Convert to fraction form
    98,752.61/148,128.92 = 54,356.51/x
  3. Step 3: Cross multiply
    98,752.61x = 148,128.92 × 54,356.51
  4. Step 4: Simplify right side
    98,752.61x = 8,051,770,108.84
  5. Step 5: Solve for x
    x = 8,051,770,108.84/98,752.61
  6. Step 6: Final answer
    x = 81,534.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.