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Finding the Fourth Proportional to 85,783.52, 128,669.08 and 26,617.68

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Solution

The fourth proportional to 85,783.52, 128,669.08 and 26,617.68 is: 39,924.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,783.52 : 128,669.08 = 26,617.68 : x
  2. Step 2: Convert to fraction form
    85,783.52/128,669.08 = 26,617.68/x
  3. Step 3: Cross multiply
    85,783.52x = 128,669.08 × 26,617.68
  4. Step 4: Simplify right side
    85,783.52x = 3,424,872,397.33
  5. Step 5: Solve for x
    x = 3,424,872,397.33/85,783.52
  6. Step 6: Final answer
    x = 39,924.60

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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.