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Finding the Fourth Proportional to 97,689.78, 134,664.93 and 76,432.14

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Solution

The fourth proportional to 97,689.78, 134,664.93 and 76,432.14 is: 105,361.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,689.78 : 134,664.93 = 76,432.14 : x
  2. Step 2: Convert to fraction form
    97,689.78/134,664.93 = 76,432.14/x
  3. Step 3: Cross multiply
    97,689.78x = 134,664.93 × 76,432.14
  4. Step 4: Simplify right side
    97,689.78x = 10,292,728,782.85
  5. Step 5: Solve for x
    x = 10,292,728,782.85/97,689.78
  6. Step 6: Final answer
    x = 105,361.37

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1.5x scale

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.