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Finding the Fourth Proportional to 65,712.84, 90,683.60 and 35,498.13

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Solution

The fourth proportional to 65,712.84, 90,683.60 and 35,498.13 is: 48,987.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,712.84 : 90,683.60 = 35,498.13 : x
  2. Step 2: Convert to fraction form
    65,712.84/90,683.60 = 35,498.13/x
  3. Step 3: Cross multiply
    65,712.84x = 90,683.60 × 35,498.13
  4. Step 4: Simplify right side
    65,712.84x = 3,219,098,221.67
  5. Step 5: Solve for x
    x = 3,219,098,221.67/65,712.84
  6. Step 6: Final answer
    x = 48,987.36

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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.