Home / 85,758.36-128,681.42-40,830.52

Finding the Fourth Proportional to 85,758.36, 128,681.42 and 40,830.52

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Solution

The fourth proportional to 85,758.36, 128,681.42 and 40,830.52 is: 61,266.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,758.36 : 128,681.42 = 40,830.52 : x
  2. Step 2: Convert to fraction form
    85,758.36/128,681.42 = 40,830.52/x
  3. Step 3: Cross multiply
    85,758.36x = 128,681.42 × 40,830.52
  4. Step 4: Simplify right side
    85,758.36x = 5,254,129,292.94
  5. Step 5: Solve for x
    x = 5,254,129,292.94/85,758.36
  6. Step 6: Final answer
    x = 61,266.67

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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.