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Finding the Fourth Proportional to 85,312, 117,723.18 and 55,098.64

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Solution

The fourth proportional to 85,312, 117,723.18 and 55,098.64 is: 76,031.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,312 : 117,723.18 = 55,098.64 : x
  2. Step 2: Convert to fraction form
    85,312/117,723.18 = 55,098.64/x
  3. Step 3: Cross multiply
    85,312x = 117,723.18 × 55,098.64
  4. Step 4: Simplify right side
    85,312x = 6,486,387,114.48
  5. Step 5: Solve for x
    x = 6,486,387,114.48/85,312
  6. Step 6: Final answer
    x = 76,031.36

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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.