Home / 208,049,848.71-286,999,940.32-128,639,525.72

Finding the Fourth Proportional to 208,049,848.71, 286,999,940.32 and 128,639,525.72

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Solution

The fourth proportional to 208,049,848.71, 286,999,940.32 and 128,639,525.72 is: 177,455,241.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,049,848.71 : 286,999,940.32 = 128,639,525.72 : x
  2. Step 2: Convert to fraction form
    208,049,848.71/286,999,940.32 = 128,639,525.72/x
  3. Step 3: Cross multiply
    208,049,848.71x = 286,999,940.32 × 128,639,525.72
  4. Step 4: Simplify right side
    208,049,848.71x = 36,919,536,204,652,216
  5. Step 5: Solve for x
    x = 36,919,536,204,652,216/208,049,848.71
  6. Step 6: Final answer
    x = 177,455,241.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.