Home / 85,335,528.12-128,003,354.43-20,639,395.50

Finding the Fourth Proportional to 85,335,528.12, 128,003,354.43 and 20,639,395.50

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Solution

The fourth proportional to 85,335,528.12, 128,003,354.43 and 20,639,395.50 is: 30,959,108.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,335,528.12 : 128,003,354.43 = 20,639,395.50 : x
  2. Step 2: Convert to fraction form
    85,335,528.12/128,003,354.43 = 20,639,395.50/x
  3. Step 3: Cross multiply
    85,335,528.12x = 128,003,354.43 × 20,639,395.50
  4. Step 4: Simplify right side
    85,335,528.12x = 2,641,911,857,407,447
  5. Step 5: Solve for x
    x = 2,641,911,857,407,447/85,335,528.12
  6. Step 6: Final answer
    x = 30,959,108.31

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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.