Home / 86,205,657.30-129,308,485.95-81,954,129.30

Finding the Fourth Proportional to 86,205,657.30, 129,308,485.95 and 81,954,129.30

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Solution

The fourth proportional to 86,205,657.30, 129,308,485.95 and 81,954,129.30 is: 122,931,193.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,205,657.30 : 129,308,485.95 = 81,954,129.30 : x
  2. Step 2: Convert to fraction form
    86,205,657.30/129,308,485.95 = 81,954,129.30/x
  3. Step 3: Cross multiply
    86,205,657.30x = 129,308,485.95 × 81,954,129.30
  4. Step 4: Simplify right side
    86,205,657.30x = 10,597,364,377,133,534
  5. Step 5: Solve for x
    x = 10,597,364,377,133,534/86,205,657.30
  6. Step 6: Final answer
    x = 122,931,193.95

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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.