Home / 90,518,123.30-135,864,872.72-85,602,294.06

Finding the Fourth Proportional to 90,518,123.30, 135,864,872.72 and 85,602,294.06

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Solution

The fourth proportional to 90,518,123.30, 135,864,872.72 and 85,602,294.06 is: 128,486,366.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,518,123.30 : 135,864,872.72 = 85,602,294.06 : x
  2. Step 2: Convert to fraction form
    90,518,123.30/135,864,872.72 = 85,602,294.06/x
  3. Step 3: Cross multiply
    90,518,123.30x = 135,864,872.72 × 85,602,294.06
  4. Step 4: Simplify right side
    90,518,123.30x = 11,630,344,787,001,912
  5. Step 5: Solve for x
    x = 11,630,344,787,001,912/90,518,123.30
  6. Step 6: Final answer
    x = 128,486,366.74

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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.