Home / 86,328,081.20-129,492,121.80-85,824,196.40

Finding the Fourth Proportional to 86,328,081.20, 129,492,121.80 and 85,824,196.40

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Solution

The fourth proportional to 86,328,081.20, 129,492,121.80 and 85,824,196.40 is: 128,736,294.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,328,081.20 : 129,492,121.80 = 85,824,196.40 : x
  2. Step 2: Convert to fraction form
    86,328,081.20/129,492,121.80 = 85,824,196.40/x
  3. Step 3: Cross multiply
    86,328,081.20x = 129,492,121.80 × 85,824,196.40
  4. Step 4: Simplify right side
    86,328,081.20x = 11,113,557,293,615,922
  5. Step 5: Solve for x
    x = 11,113,557,293,615,922/86,328,081.20
  6. Step 6: Final answer
    x = 128,736,294.60

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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.