Home / 139,968,002.90-209,952,004.35-78,745,999.70

Finding the Fourth Proportional to 139,968,002.90, 209,952,004.35 and 78,745,999.70

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Solution

The fourth proportional to 139,968,002.90, 209,952,004.35 and 78,745,999.70 is: 118,118,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,002.90 : 209,952,004.35 = 78,745,999.70 : x
  2. Step 2: Convert to fraction form
    139,968,002.90/209,952,004.35 = 78,745,999.70/x
  3. Step 3: Cross multiply
    139,968,002.90x = 209,952,004.35 × 78,745,999.70
  4. Step 4: Simplify right side
    139,968,002.90x = 16,532,880,471,559,498
  5. Step 5: Solve for x
    x = 16,532,880,471,559,498/139,968,002.90
  6. Step 6: Final answer
    x = 118,118,999.55

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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.