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Finding the Fourth Proportional to 84,786.64, 117,011.04 and 48,978.16

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Solution

The fourth proportional to 84,786.64, 117,011.04 and 48,978.16 is: 67,593.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,786.64 : 117,011.04 = 48,978.16 : x
  2. Step 2: Convert to fraction form
    84,786.64/117,011.04 = 48,978.16/x
  3. Step 3: Cross multiply
    84,786.64x = 117,011.04 × 48,978.16
  4. Step 4: Simplify right side
    84,786.64x = 5,730,985,438.89
  5. Step 5: Solve for x
    x = 5,730,985,438.89/84,786.64
  6. Step 6: Final answer
    x = 67,593.02

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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.