Home / 81,408,139.80-122,112,209.70-80,841,269.40

Finding the Fourth Proportional to 81,408,139.80, 122,112,209.70 and 80,841,269.40

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Solution

The fourth proportional to 81,408,139.80, 122,112,209.70 and 80,841,269.40 is: 121,261,904.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,408,139.80 : 122,112,209.70 = 80,841,269.40 : x
  2. Step 2: Convert to fraction form
    81,408,139.80/122,112,209.70 = 80,841,269.40/x
  3. Step 3: Cross multiply
    81,408,139.80x = 122,112,209.70 × 80,841,269.40
  4. Step 4: Simplify right side
    81,408,139.80x = 9,871,706,041,386,994
  5. Step 5: Solve for x
    x = 9,871,706,041,386,994/81,408,139.80
  6. Step 6: Final answer
    x = 121,261,904.10

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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.