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Finding the Fourth Proportional to 85,513.59, 117,995.54 and 47,780.55

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Solution

The fourth proportional to 85,513.59, 117,995.54 and 47,780.55 is: 65,929.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,513.59 : 117,995.54 = 47,780.55 : x
  2. Step 2: Convert to fraction form
    85,513.59/117,995.54 = 47,780.55/x
  3. Step 3: Cross multiply
    85,513.59x = 117,995.54 × 47,780.55
  4. Step 4: Simplify right side
    85,513.59x = 5,637,891,559.84
  5. Step 5: Solve for x
    x = 5,637,891,559.84/85,513.59
  6. Step 6: Final answer
    x = 65,929.77

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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.