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Finding the Fourth Proportional to 163,648.84, 245,412.78 and 128,656.84

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Solution

The fourth proportional to 163,648.84, 245,412.78 and 128,656.84 is: 192,937.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,648.84 : 245,412.78 = 128,656.84 : x
  2. Step 2: Convert to fraction form
    163,648.84/245,412.78 = 128,656.84/x
  3. Step 3: Cross multiply
    163,648.84x = 245,412.78 × 128,656.84
  4. Step 4: Simplify right side
    163,648.84x = 31,574,032,770.42
  5. Step 5: Solve for x
    x = 31,574,032,770.42/163,648.84
  6. Step 6: Final answer
    x = 192,937.71

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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.