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Finding the Fourth Proportional to 64,485.15, 88,989.87 and 35,805.21

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Solution

The fourth proportional to 64,485.15, 88,989.87 and 35,805.21 is: 49,411.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,485.15 : 88,989.87 = 35,805.21 : x
  2. Step 2: Convert to fraction form
    64,485.15/88,989.87 = 35,805.21/x
  3. Step 3: Cross multiply
    64,485.15x = 88,989.87 × 35,805.21
  4. Step 4: Simplify right side
    64,485.15x = 3,186,300,983.22
  5. Step 5: Solve for x
    x = 3,186,300,983.22/64,485.15
  6. Step 6: Final answer
    x = 49,411.39

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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.