Home / 90,009,342.40-135,014,013.60-86,230,206.40

Finding the Fourth Proportional to 90,009,342.40, 135,014,013.60 and 86,230,206.40

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Solution

The fourth proportional to 90,009,342.40, 135,014,013.60 and 86,230,206.40 is: 129,345,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,009,342.40 : 135,014,013.60 = 86,230,206.40 : x
  2. Step 2: Convert to fraction form
    90,009,342.40/135,014,013.60 = 86,230,206.40/x
  3. Step 3: Cross multiply
    90,009,342.40x = 135,014,013.60 × 86,230,206.40
  4. Step 4: Simplify right side
    90,009,342.40x = 11,642,286,259,620,408
  5. Step 5: Solve for x
    x = 11,642,286,259,620,408/90,009,342.40
  6. Step 6: Final answer
    x = 129,345,309.60

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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.