Home / 139,549,687.20-209,324,530.80-90,763,403.40

Finding the Fourth Proportional to 139,549,687.20, 209,324,530.80 and 90,763,403.40

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Solution

The fourth proportional to 139,549,687.20, 209,324,530.80 and 90,763,403.40 is: 136,145,105.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,549,687.20 : 209,324,530.80 = 90,763,403.40 : x
  2. Step 2: Convert to fraction form
    139,549,687.20/209,324,530.80 = 90,763,403.40/x
  3. Step 3: Cross multiply
    139,549,687.20x = 209,324,530.80 × 90,763,403.40
  4. Step 4: Simplify right side
    139,549,687.20x = 18,999,006,830,516,128
  5. Step 5: Solve for x
    x = 18,999,006,830,516,128/139,549,687.20
  6. Step 6: Final answer
    x = 136,145,105.10

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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.