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Finding the Fourth Proportional to 85,793.84, 128,646.88 and 35,860.31

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Solution

The fourth proportional to 85,793.84, 128,646.88 and 35,860.31 is: 53,772.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,793.84 : 128,646.88 = 35,860.31 : x
  2. Step 2: Convert to fraction form
    85,793.84/128,646.88 = 35,860.31/x
  3. Step 3: Cross multiply
    85,793.84x = 128,646.88 × 35,860.31
  4. Step 4: Simplify right side
    85,793.84x = 4,613,316,818.03
  5. Step 5: Solve for x
    x = 4,613,316,818.03/85,793.84
  6. Step 6: Final answer
    x = 53,772.12

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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.