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Finding the Fourth Proportional to 128,397.84, 192,628.32 and 44,159.28

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Solution

The fourth proportional to 128,397.84, 192,628.32 and 44,159.28 is: 66,249.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,397.84 : 192,628.32 = 44,159.28 : x
  2. Step 2: Convert to fraction form
    128,397.84/192,628.32 = 44,159.28/x
  3. Step 3: Cross multiply
    128,397.84x = 192,628.32 × 44,159.28
  4. Step 4: Simplify right side
    128,397.84x = 8,506,327,918.81
  5. Step 5: Solve for x
    x = 8,506,327,918.81/128,397.84
  6. Step 6: Final answer
    x = 66,249.77

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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.