Home / 90,567,490.60-135,851,235.90-85,890,809.80

Finding the Fourth Proportional to 90,567,490.60, 135,851,235.90 and 85,890,809.80

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Solution

The fourth proportional to 90,567,490.60, 135,851,235.90 and 85,890,809.80 is: 128,836,214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,567,490.60 : 135,851,235.90 = 85,890,809.80 : x
  2. Step 2: Convert to fraction form
    90,567,490.60/135,851,235.90 = 85,890,809.80/x
  3. Step 3: Cross multiply
    90,567,490.60x = 135,851,235.90 × 85,890,809.80
  4. Step 4: Simplify right side
    90,567,490.60x = 11,668,372,663,781,832
  5. Step 5: Solve for x
    x = 11,668,372,663,781,832/90,567,490.60
  6. Step 6: Final answer
    x = 128,836,214.70

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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.