Home / 90,511.25-125,035.81-72,338.70

Finding the Fourth Proportional to 90,511.25, 125,035.81 and 72,338.70

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Solution

The fourth proportional to 90,511.25, 125,035.81 and 72,338.70 is: 99,931.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,511.25 : 125,035.81 = 72,338.70 : x
  2. Step 2: Convert to fraction form
    90,511.25/125,035.81 = 72,338.70/x
  3. Step 3: Cross multiply
    90,511.25x = 125,035.81 × 72,338.70
  4. Step 4: Simplify right side
    90,511.25x = 9,044,927,948.85
  5. Step 5: Solve for x
    x = 9,044,927,948.85/90,511.25
  6. Step 6: Final answer
    x = 99,931.54

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1.5x scale

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.