Home / 139,408,886.40-209,113,329.60-128,261,212.80

Finding the Fourth Proportional to 139,408,886.40, 209,113,329.60 and 128,261,212.80

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Solution

The fourth proportional to 139,408,886.40, 209,113,329.60 and 128,261,212.80 is: 192,391,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,408,886.40 : 209,113,329.60 = 128,261,212.80 : x
  2. Step 2: Convert to fraction form
    139,408,886.40/209,113,329.60 = 128,261,212.80/x
  3. Step 3: Cross multiply
    139,408,886.40x = 209,113,329.60 × 128,261,212.80
  4. Step 4: Simplify right side
    139,408,886.40x = 26,821,129,267,142,136
  5. Step 5: Solve for x
    x = 26,821,129,267,142,136/139,408,886.40
  6. Step 6: Final answer
    x = 192,391,819.20

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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.