Home / 78,531,185.31-117,643,532.13-61,178,133.48

Finding the Fourth Proportional to 78,531,185.31, 117,643,532.13 and 61,178,133.48

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Solution

The fourth proportional to 78,531,185.31, 117,643,532.13 and 61,178,133.48 is: 91,647,817.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,531,185.31 : 117,643,532.13 = 61,178,133.48 : x
  2. Step 2: Convert to fraction form
    78,531,185.31/117,643,532.13 = 61,178,133.48/x
  3. Step 3: Cross multiply
    78,531,185.31x = 117,643,532.13 × 61,178,133.48
  4. Step 4: Simplify right side
    78,531,185.31x = 7,197,211,711,707,808
  5. Step 5: Solve for x
    x = 7,197,211,711,707,808/78,531,185.31
  6. Step 6: Final answer
    x = 91,647,817.15

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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.