Home / 129,312,021.20-193,968,031.80-115,281,978.80

Finding the Fourth Proportional to 129,312,021.20, 193,968,031.80 and 115,281,978.80

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Solution

The fourth proportional to 129,312,021.20, 193,968,031.80 and 115,281,978.80 is: 172,922,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,312,021.20 : 193,968,031.80 = 115,281,978.80 : x
  2. Step 2: Convert to fraction form
    129,312,021.20/193,968,031.80 = 115,281,978.80/x
  3. Step 3: Cross multiply
    129,312,021.20x = 193,968,031.80 × 115,281,978.80
  4. Step 4: Simplify right side
    129,312,021.20x = 22,361,018,529,845,328
  5. Step 5: Solve for x
    x = 22,361,018,529,845,328/129,312,021.20
  6. Step 6: Final answer
    x = 172,922,968.20

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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.