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Finding the Fourth Proportional to 65,308.40, 90,124.76 and 35,500.40

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Solution

The fourth proportional to 65,308.40, 90,124.76 and 35,500.40 is: 48,990.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,308.40 : 90,124.76 = 35,500.40 : x
  2. Step 2: Convert to fraction form
    65,308.40/90,124.76 = 35,500.40/x
  3. Step 3: Cross multiply
    65,308.40x = 90,124.76 × 35,500.40
  4. Step 4: Simplify right side
    65,308.40x = 3,199,465,029.90
  5. Step 5: Solve for x
    x = 3,199,465,029.90/65,308.40
  6. Step 6: Final answer
    x = 48,990.10

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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.