Home / 208,049,851.77-286,999,944.53-128,639,528.78

Finding the Fourth Proportional to 208,049,851.77, 286,999,944.53 and 128,639,528.78

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Solution

The fourth proportional to 208,049,851.77, 286,999,944.53 and 128,639,528.78 is: 177,455,245.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,049,851.77 : 286,999,944.53 = 128,639,528.78 : x
  2. Step 2: Convert to fraction form
    208,049,851.77/286,999,944.53 = 128,639,528.78/x
  3. Step 3: Cross multiply
    208,049,851.77x = 286,999,944.53 × 128,639,528.78
  4. Step 4: Simplify right side
    208,049,851.77x = 36,919,537,622,147,136
  5. Step 5: Solve for x
    x = 36,919,537,622,147,136/208,049,851.77
  6. Step 6: Final answer
    x = 177,455,245.98

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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.