Home / 86,289,256.80-129,433,885.20-72,684,367.20

Finding the Fourth Proportional to 86,289,256.80, 129,433,885.20 and 72,684,367.20

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Solution

The fourth proportional to 86,289,256.80, 129,433,885.20 and 72,684,367.20 is: 109,026,550.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,289,256.80 : 129,433,885.20 = 72,684,367.20 : x
  2. Step 2: Convert to fraction form
    86,289,256.80/129,433,885.20 = 72,684,367.20/x
  3. Step 3: Cross multiply
    86,289,256.80x = 129,433,885.20 × 72,684,367.20
  4. Step 4: Simplify right side
    86,289,256.80x = 9,407,820,039,999,446
  5. Step 5: Solve for x
    x = 9,407,820,039,999,446/86,289,256.80
  6. Step 6: Final answer
    x = 109,026,550.80

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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.