Home / 139,798,000.40-209,697,000.60-78,575,997.20

Finding the Fourth Proportional to 139,798,000.40, 209,697,000.60 and 78,575,997.20

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Solution

The fourth proportional to 139,798,000.40, 209,697,000.60 and 78,575,997.20 is: 117,863,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,798,000.40 : 209,697,000.60 = 78,575,997.20 : x
  2. Step 2: Convert to fraction form
    139,798,000.40/209,697,000.60 = 78,575,997.20/x
  3. Step 3: Cross multiply
    139,798,000.40x = 209,697,000.60 × 78,575,997.20
  4. Step 4: Simplify right side
    139,798,000.40x = 16,477,150,931,993,998
  5. Step 5: Solve for x
    x = 16,477,150,931,993,998/139,798,000.40
  6. Step 6: Final answer
    x = 117,863,995.80

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1.5x scale

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.