Home / 86,643,328.11-129,963,990.25-21,064,837.32

Finding the Fourth Proportional to 86,643,328.11, 129,963,990.25 and 21,064,837.32

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Solution

The fourth proportional to 86,643,328.11, 129,963,990.25 and 21,064,837.32 is: 31,597,012.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,643,328.11 : 129,963,990.25 = 21,064,837.32 : x
  2. Step 2: Convert to fraction form
    86,643,328.11/129,963,990.25 = 21,064,837.32/x
  3. Step 3: Cross multiply
    86,643,328.11x = 129,963,990.25 × 21,064,837.32
  4. Step 4: Simplify right side
    86,643,328.11x = 2,737,670,311,319,172.50
  5. Step 5: Solve for x
    x = 2,737,670,311,319,172.50/86,643,328.11
  6. Step 6: Final answer
    x = 31,597,012.38

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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.