Home / 91,913.43-137,988.21-70,866.84

Finding the Fourth Proportional to 91,913.43, 137,988.21 and 70,866.84

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Solution

The fourth proportional to 91,913.43, 137,988.21 and 70,866.84 is: 106,391.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,913.43 : 137,988.21 = 70,866.84 : x
  2. Step 2: Convert to fraction form
    91,913.43/137,988.21 = 70,866.84/x
  3. Step 3: Cross multiply
    91,913.43x = 137,988.21 × 70,866.84
  4. Step 4: Simplify right side
    91,913.43x = 9,778,788,665.71
  5. Step 5: Solve for x
    x = 9,778,788,665.71/91,913.43
  6. Step 6: Final answer
    x = 106,391.29

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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.