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Finding the Fourth Proportional to 98,642.88, 147,968.64 and 28,529.28

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Solution

The fourth proportional to 98,642.88, 147,968.64 and 28,529.28 is: 42,795.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,642.88 : 147,968.64 = 28,529.28 : x
  2. Step 2: Convert to fraction form
    98,642.88/147,968.64 = 28,529.28/x
  3. Step 3: Cross multiply
    98,642.88x = 147,968.64 × 28,529.28
  4. Step 4: Simplify right side
    98,642.88x = 4,221,438,761.78
  5. Step 5: Solve for x
    x = 4,221,438,761.78/98,642.88
  6. Step 6: Final answer
    x = 42,795.17

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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.