Home / 90,009,314.40-135,013,971.60-86,230,178.40

Finding the Fourth Proportional to 90,009,314.40, 135,013,971.60 and 86,230,178.40

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Solution

The fourth proportional to 90,009,314.40, 135,013,971.60 and 86,230,178.40 is: 129,345,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,009,314.40 : 135,013,971.60 = 86,230,178.40 : x
  2. Step 2: Convert to fraction form
    90,009,314.40/135,013,971.60 = 86,230,178.40/x
  3. Step 3: Cross multiply
    90,009,314.40x = 135,013,971.60 × 86,230,178.40
  4. Step 4: Simplify right side
    90,009,314.40x = 11,642,278,857,560,534
  5. Step 5: Solve for x
    x = 11,642,278,857,560,534/90,009,314.40
  6. Step 6: Final answer
    x = 129,345,267.60

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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.