Home / 109,156,947.20-163,735,420.80-78,386,513.30

Finding the Fourth Proportional to 109,156,947.20, 163,735,420.80 and 78,386,513.30

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Solution

The fourth proportional to 109,156,947.20, 163,735,420.80 and 78,386,513.30 is: 117,579,769.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,156,947.20 : 163,735,420.80 = 78,386,513.30 : x
  2. Step 2: Convert to fraction form
    109,156,947.20/163,735,420.80 = 78,386,513.30/x
  3. Step 3: Cross multiply
    109,156,947.20x = 163,735,420.80 × 78,386,513.30
  4. Step 4: Simplify right side
    109,156,947.20x = 12,834,648,740,220,298
  5. Step 5: Solve for x
    x = 12,834,648,740,220,298/109,156,947.20
  6. Step 6: Final answer
    x = 117,579,769.95

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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.