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Finding the Fourth Proportional to 128,024.04, 191,664.18 and 74,553

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Solution

The fourth proportional to 128,024.04, 191,664.18 and 74,553 is: 111,612.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,024.04 : 191,664.18 = 74,553 : x
  2. Step 2: Convert to fraction form
    128,024.04/191,664.18 = 74,553/x
  3. Step 3: Cross multiply
    128,024.04x = 191,664.18 × 74,553
  4. Step 4: Simplify right side
    128,024.04x = 14,289,139,611.54
  5. Step 5: Solve for x
    x = 14,289,139,611.54/128,024.04
  6. Step 6: Final answer
    x = 111,612.94

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1.5x scale

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.