Home / 139,968,472.20-209,952,708.30-42,939,155.40

Finding the Fourth Proportional to 139,968,472.20, 209,952,708.30 and 42,939,155.40

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Solution

The fourth proportional to 139,968,472.20, 209,952,708.30 and 42,939,155.40 is: 64,408,733.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,472.20 : 209,952,708.30 = 42,939,155.40 : x
  2. Step 2: Convert to fraction form
    139,968,472.20/209,952,708.30 = 42,939,155.40/x
  3. Step 3: Cross multiply
    139,968,472.20x = 209,952,708.30 × 42,939,155.40
  4. Step 4: Simplify right side
    139,968,472.20x = 9,015,191,968,344,570
  5. Step 5: Solve for x
    x = 9,015,191,968,344,570/139,968,472.20
  6. Step 6: Final answer
    x = 64,408,733.10

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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.