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Finding the Fourth Proportional to 85,851.68, 118,508.88 and 65,707.36

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Solution

The fourth proportional to 85,851.68, 118,508.88 and 65,707.36 is: 90,701.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,851.68 : 118,508.88 = 65,707.36 : x
  2. Step 2: Convert to fraction form
    85,851.68/118,508.88 = 65,707.36/x
  3. Step 3: Cross multiply
    85,851.68x = 118,508.88 × 65,707.36
  4. Step 4: Simplify right side
    85,851.68x = 7,786,905,641.36
  5. Step 5: Solve for x
    x = 7,786,905,641.36/85,851.68
  6. Step 6: Final answer
    x = 90,701.84

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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.