Home / 109,156,931.20-163,735,396.80-78,386,497.30

Finding the Fourth Proportional to 109,156,931.20, 163,735,396.80 and 78,386,497.30

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Solution

The fourth proportional to 109,156,931.20, 163,735,396.80 and 78,386,497.30 is: 117,579,745.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,156,931.20 : 163,735,396.80 = 78,386,497.30 : x
  2. Step 2: Convert to fraction form
    109,156,931.20/163,735,396.80 = 78,386,497.30/x
  3. Step 3: Cross multiply
    109,156,931.20x = 163,735,396.80 × 78,386,497.30
  4. Step 4: Simplify right side
    109,156,931.20x = 12,834,644,239,177,630
  5. Step 5: Solve for x
    x = 12,834,644,239,177,630/109,156,931.20
  6. Step 6: Final answer
    x = 117,579,745.95

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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.