Home / 91,721.40-137,582.10-70,959.80

Finding the Fourth Proportional to 91,721.40, 137,582.10 and 70,959.80

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Solution

The fourth proportional to 91,721.40, 137,582.10 and 70,959.80 is: 106,439.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,721.40 : 137,582.10 = 70,959.80 : x
  2. Step 2: Convert to fraction form
    91,721.40/137,582.10 = 70,959.80/x
  3. Step 3: Cross multiply
    91,721.40x = 137,582.10 × 70,959.80
  4. Step 4: Simplify right side
    91,721.40x = 9,762,798,299.58
  5. Step 5: Solve for x
    x = 9,762,798,299.58/91,721.40
  6. Step 6: Final answer
    x = 106,439.70

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1.5x scale

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.