Home / 129,458,703.20-194,188,054.80-81,085,762.40

Finding the Fourth Proportional to 129,458,703.20, 194,188,054.80 and 81,085,762.40

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Solution

The fourth proportional to 129,458,703.20, 194,188,054.80 and 81,085,762.40 is: 121,628,643.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,458,703.20 : 194,188,054.80 = 81,085,762.40 : x
  2. Step 2: Convert to fraction form
    129,458,703.20/194,188,054.80 = 81,085,762.40/x
  3. Step 3: Cross multiply
    129,458,703.20x = 194,188,054.80 × 81,085,762.40
  4. Step 4: Simplify right side
    129,458,703.20x = 15,745,886,472,430,982
  5. Step 5: Solve for x
    x = 15,745,886,472,430,982/129,458,703.20
  6. Step 6: Final answer
    x = 121,628,643.60

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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.