Home / 208,049,944.10-287,000,071.72-128,639,621.07

Finding the Fourth Proportional to 208,049,944.10, 287,000,071.72 and 128,639,621.07

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Solution

The fourth proportional to 208,049,944.10, 287,000,071.72 and 128,639,621.07 is: 177,455,373.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,049,944.10 : 287,000,071.72 = 128,639,621.07 : x
  2. Step 2: Convert to fraction form
    208,049,944.10/287,000,071.72 = 128,639,621.07/x
  3. Step 3: Cross multiply
    208,049,944.10x = 287,000,071.72 × 128,639,621.07
  4. Step 4: Simplify right side
    208,049,944.10x = 36,919,580,472,802,016
  5. Step 5: Solve for x
    x = 36,919,580,472,802,016/208,049,944.10
  6. Step 6: Final answer
    x = 177,455,373.20

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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.