Home / 139,968,004.70-209,952,007.05-128,914,031.90

Finding the Fourth Proportional to 139,968,004.70, 209,952,007.05 and 128,914,031.90

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Solution

The fourth proportional to 139,968,004.70, 209,952,007.05 and 128,914,031.90 is: 193,371,047.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,004.70 : 209,952,007.05 = 128,914,031.90 : x
  2. Step 2: Convert to fraction form
    139,968,004.70/209,952,007.05 = 128,914,031.90/x
  3. Step 3: Cross multiply
    139,968,004.70x = 209,952,007.05 × 128,914,031.90
  4. Step 4: Simplify right side
    139,968,004.70x = 27,065,759,734,312,728
  5. Step 5: Solve for x
    x = 27,065,759,734,312,728/139,968,004.70
  6. Step 6: Final answer
    x = 193,371,047.85

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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.