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Finding the Fourth Proportional to 139,018,912.80, 208,603,018.80 and 58,248,045.60

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Solution

The fourth proportional to 139,018,912.80, 208,603,018.80 and 58,248,045.60 is: 87,403,346.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,018,912.80 : 208,603,018.80 = 58,248,045.60 : x
  2. Step 2: Convert to fraction form
    139,018,912.80/208,603,018.80 = 58,248,045.60/x
  3. Step 3: Cross multiply
    139,018,912.80x = 208,603,018.80 × 58,248,045.60
  4. Step 4: Simplify right side
    139,018,912.80x = 12,150,718,151,360,058
  5. Step 5: Solve for x
    x = 12,150,718,151,360,058/139,018,912.80
  6. Step 6: Final answer
    x = 87,403,346.11

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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.