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Finding the Fourth Proportional to 64,671.74, 89,245.16 and 35,990.95

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Solution

The fourth proportional to 64,671.74, 89,245.16 and 35,990.95 is: 49,666.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,671.74 : 89,245.16 = 35,990.95 : x
  2. Step 2: Convert to fraction form
    64,671.74/89,245.16 = 35,990.95/x
  3. Step 3: Cross multiply
    64,671.74x = 89,245.16 × 35,990.95
  4. Step 4: Simplify right side
    64,671.74x = 3,212,017,465.12
  5. Step 5: Solve for x
    x = 3,212,017,465.12/64,671.74
  6. Step 6: Final answer
    x = 49,666.48

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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.