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Finding the Fourth Proportional to 128,857.96, 193,300.16 and 44,618

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Solution

The fourth proportional to 128,857.96, 193,300.16 and 44,618 is: 66,931.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,857.96 : 193,300.16 = 44,618 : x
  2. Step 2: Convert to fraction form
    128,857.96/193,300.16 = 44,618/x
  3. Step 3: Cross multiply
    128,857.96x = 193,300.16 × 44,618
  4. Step 4: Simplify right side
    128,857.96x = 8,624,666,538.88
  5. Step 5: Solve for x
    x = 8,624,666,538.88/128,857.96
  6. Step 6: Final answer
    x = 66,931.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.