Home / 139,968,253.20-209,952,379.80-128,914,280.40

Finding the Fourth Proportional to 139,968,253.20, 209,952,379.80 and 128,914,280.40

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Solution

The fourth proportional to 139,968,253.20, 209,952,379.80 and 128,914,280.40 is: 193,371,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,253.20 : 209,952,379.80 = 128,914,280.40 : x
  2. Step 2: Convert to fraction form
    139,968,253.20/209,952,379.80 = 128,914,280.40/x
  3. Step 3: Cross multiply
    139,968,253.20x = 209,952,379.80 × 128,914,280.40
  4. Step 4: Simplify right side
    139,968,253.20x = 27,065,859,960,184,500
  5. Step 5: Solve for x
    x = 27,065,859,960,184,500/139,968,253.20
  6. Step 6: Final answer
    x = 193,371,420.60

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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.