Home / 86,035,478.20-128,679,969.30-77,002,876.60

Finding the Fourth Proportional to 86,035,478.20, 128,679,969.30 and 77,002,876.60

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Solution

The fourth proportional to 86,035,478.20, 128,679,969.30 and 77,002,876.60 is: 115,170,253.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,035,478.20 : 128,679,969.30 = 77,002,876.60 : x
  2. Step 2: Convert to fraction form
    86,035,478.20/128,679,969.30 = 77,002,876.60/x
  3. Step 3: Cross multiply
    86,035,478.20x = 128,679,969.30 × 77,002,876.60
  4. Step 4: Simplify right side
    86,035,478.20x = 9,908,727,796,899,688
  5. Step 5: Solve for x
    x = 9,908,727,796,899,688/86,035,478.20
  6. Step 6: Final answer
    x = 115,170,253.07

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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.