Home / 129,310,427.20-193,965,640.80-115,280,384.80

Finding the Fourth Proportional to 129,310,427.20, 193,965,640.80 and 115,280,384.80

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Solution

The fourth proportional to 129,310,427.20, 193,965,640.80 and 115,280,384.80 is: 172,920,577.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,310,427.20 : 193,965,640.80 = 115,280,384.80 : x
  2. Step 2: Convert to fraction form
    129,310,427.20/193,965,640.80 = 115,280,384.80/x
  3. Step 3: Cross multiply
    129,310,427.20x = 193,965,640.80 × 115,280,384.80
  4. Step 4: Simplify right side
    129,310,427.20x = 22,360,433,709,402,580
  5. Step 5: Solve for x
    x = 22,360,433,709,402,580/129,310,427.20
  6. Step 6: Final answer
    x = 172,920,577.20

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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.