Home / 85,757,661.29-128,299,758.69-66,178,968.83

Finding the Fourth Proportional to 85,757,661.29, 128,299,758.69 and 66,178,968.83

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Solution

The fourth proportional to 85,757,661.29, 128,299,758.69 and 66,178,968.83 is: 99,008,597.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,757,661.29 : 128,299,758.69 = 66,178,968.83 : x
  2. Step 2: Convert to fraction form
    85,757,661.29/128,299,758.69 = 66,178,968.83/x
  3. Step 3: Cross multiply
    85,757,661.29x = 128,299,758.69 × 66,178,968.83
  4. Step 4: Simplify right side
    85,757,661.29x = 8,490,745,731,242,031
  5. Step 5: Solve for x
    x = 8,490,745,731,242,031/85,757,661.29
  6. Step 6: Final answer
    x = 99,008,597.06

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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.