Home / 127,408,208.51-190,673,184.74-78,191,391.89

Finding the Fourth Proportional to 127,408,208.51, 190,673,184.74 and 78,191,391.89

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Solution

The fourth proportional to 127,408,208.51, 190,673,184.74 and 78,191,391.89 is: 117,017,591.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,408,208.51 : 190,673,184.74 = 78,191,391.89 : x
  2. Step 2: Convert to fraction form
    127,408,208.51/190,673,184.74 = 78,191,391.89/x
  3. Step 3: Cross multiply
    127,408,208.51x = 190,673,184.74 × 78,191,391.89
  4. Step 4: Simplify right side
    127,408,208.51x = 14,909,001,711,005,434
  5. Step 5: Solve for x
    x = 14,909,001,711,005,434/127,408,208.51
  6. Step 6: Final answer
    x = 117,017,591.61

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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.