Home / 72,156,019.20-99,579,374.72-42,804,729.60

Finding the Fourth Proportional to 72,156,019.20, 99,579,374.72 and 42,804,729.60

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Solution

The fourth proportional to 72,156,019.20, 99,579,374.72 and 42,804,729.60 is: 59,072,940.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,156,019.20 : 99,579,374.72 = 42,804,729.60 : x
  2. Step 2: Convert to fraction form
    72,156,019.20/99,579,374.72 = 42,804,729.60/x
  3. Step 3: Cross multiply
    72,156,019.20x = 99,579,374.72 × 42,804,729.60
  4. Step 4: Simplify right side
    72,156,019.20x = 4,262,468,208,626,676
  5. Step 5: Solve for x
    x = 4,262,468,208,626,676/72,156,019.20
  6. Step 6: Final answer
    x = 59,072,940.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.