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Finding the Fourth Proportional to 64,485.80, 88,990.74 and 35,805.90

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Solution

The fourth proportional to 64,485.80, 88,990.74 and 35,805.90 is: 49,412.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,485.80 : 88,990.74 = 35,805.90 : x
  2. Step 2: Convert to fraction form
    64,485.80/88,990.74 = 35,805.90/x
  3. Step 3: Cross multiply
    64,485.80x = 88,990.74 × 35,805.90
  4. Step 4: Simplify right side
    64,485.80x = 3,186,393,537.37
  5. Step 5: Solve for x
    x = 3,186,393,537.37/64,485.80
  6. Step 6: Final answer
    x = 49,412.33

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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.