Home / 78,475,598.78-117,713,715.44-31,789,967.60

Finding the Fourth Proportional to 78,475,598.78, 117,713,715.44 and 31,789,967.60

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Solution

The fourth proportional to 78,475,598.78, 117,713,715.44 and 31,789,967.60 is: 47,685,079.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,475,598.78 : 117,713,715.44 = 31,789,967.60 : x
  2. Step 2: Convert to fraction form
    78,475,598.78/117,713,715.44 = 31,789,967.60/x
  3. Step 3: Cross multiply
    78,475,598.78x = 117,713,715.44 × 31,789,967.60
  4. Step 4: Simplify right side
    78,475,598.78x = 3,742,115,200,048,554
  5. Step 5: Solve for x
    x = 3,742,115,200,048,554/78,475,598.78
  6. Step 6: Final answer
    x = 47,685,079.93

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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.