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Finding the Fourth Proportional to 65,693.45, 90,656.95 and 35,478.77

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Solution

The fourth proportional to 65,693.45, 90,656.95 and 35,478.77 is: 48,960.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,693.45 : 90,656.95 = 35,478.77 : x
  2. Step 2: Convert to fraction form
    65,693.45/90,656.95 = 35,478.77/x
  3. Step 3: Cross multiply
    65,693.45x = 90,656.95 × 35,478.77
  4. Step 4: Simplify right side
    65,693.45x = 3,216,397,077.95
  5. Step 5: Solve for x
    x = 3,216,397,077.95/65,693.45
  6. Step 6: Final answer
    x = 48,960.70

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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.