Home / 139,968,137.60-209,952,206.40-78,746,134.40

Finding the Fourth Proportional to 139,968,137.60, 209,952,206.40 and 78,746,134.40

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Solution

The fourth proportional to 139,968,137.60, 209,952,206.40 and 78,746,134.40 is: 118,119,201.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,137.60 : 209,952,206.40 = 78,746,134.40 : x
  2. Step 2: Convert to fraction form
    139,968,137.60/209,952,206.40 = 78,746,134.40/x
  3. Step 3: Cross multiply
    139,968,137.60x = 209,952,206.40 × 78,746,134.40
  4. Step 4: Simplify right side
    139,968,137.60x = 16,532,924,662,750,942
  5. Step 5: Solve for x
    x = 16,532,924,662,750,942/139,968,137.60
  6. Step 6: Final answer
    x = 118,119,201.60

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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.