Home / 139,522,143.40-209,283,215.10-42,477,080.20

Finding the Fourth Proportional to 139,522,143.40, 209,283,215.10 and 42,477,080.20

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Solution

The fourth proportional to 139,522,143.40, 209,283,215.10 and 42,477,080.20 is: 63,715,620.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,522,143.40 : 209,283,215.10 = 42,477,080.20 : x
  2. Step 2: Convert to fraction form
    139,522,143.40/209,283,215.10 = 42,477,080.20/x
  3. Step 3: Cross multiply
    139,522,143.40x = 209,283,215.10 × 42,477,080.20
  4. Step 4: Simplify right side
    139,522,143.40x = 8,889,739,912,316,551
  5. Step 5: Solve for x
    x = 8,889,739,912,316,551/139,522,143.40
  6. Step 6: Final answer
    x = 63,715,620.30

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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.