Home / 90,100,069.50-133,991,052.12-87,230,258.94

Finding the Fourth Proportional to 90,100,069.50, 133,991,052.12 and 87,230,258.94

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Solution

The fourth proportional to 90,100,069.50, 133,991,052.12 and 87,230,258.94 is: 129,723,253.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,100,069.50 : 133,991,052.12 = 87,230,258.94 : x
  2. Step 2: Convert to fraction form
    90,100,069.50/133,991,052.12 = 87,230,258.94/x
  3. Step 3: Cross multiply
    90,100,069.50x = 133,991,052.12 × 87,230,258.94
  4. Step 4: Simplify right side
    90,100,069.50x = 11,688,074,172,070,636
  5. Step 5: Solve for x
    x = 11,688,074,172,070,636/90,100,069.50
  6. Step 6: Final answer
    x = 129,723,253.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.