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Finding the Fourth Proportional to 224,153.61, 309,350.51 and 128,678.74

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Solution

The fourth proportional to 224,153.61, 309,350.51 and 128,678.74 is: 177,587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,153.61 : 309,350.51 = 128,678.74 : x
  2. Step 2: Convert to fraction form
    224,153.61/309,350.51 = 128,678.74/x
  3. Step 3: Cross multiply
    224,153.61x = 309,350.51 × 128,678.74
  4. Step 4: Simplify right side
    224,153.61x = 39,806,833,845.16
  5. Step 5: Solve for x
    x = 39,806,833,845.16/224,153.61
  6. Step 6: Final answer
    x = 177,587.30

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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.