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Finding the Fourth Proportional to 65,683.76, 90,645.74 and 35,875.76

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Solution

The fourth proportional to 65,683.76, 90,645.74 and 35,875.76 is: 49,509.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,683.76 : 90,645.74 = 35,875.76 : x
  2. Step 2: Convert to fraction form
    65,683.76/90,645.74 = 35,875.76/x
  3. Step 3: Cross multiply
    65,683.76x = 90,645.74 × 35,875.76
  4. Step 4: Simplify right side
    65,683.76x = 3,251,984,813.26
  5. Step 5: Solve for x
    x = 3,251,984,813.26/65,683.76
  6. Step 6: Final answer
    x = 49,509.72

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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.