Home / 105,307.38-145,421.73-67,647.78

Finding the Fourth Proportional to 105,307.38, 145,421.73 and 67,647.78

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Solution

The fourth proportional to 105,307.38, 145,421.73 and 67,647.78 is: 93,416.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,307.38 : 145,421.73 = 67,647.78 : x
  2. Step 2: Convert to fraction form
    105,307.38/145,421.73 = 67,647.78/x
  3. Step 3: Cross multiply
    105,307.38x = 145,421.73 × 67,647.78
  4. Step 4: Simplify right side
    105,307.38x = 9,837,457,198.26
  5. Step 5: Solve for x
    x = 9,837,457,198.26/105,307.38
  6. Step 6: Final answer
    x = 93,416.60

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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.