Home / 90,009,343.40-135,014,015.10-86,230,207.40

Finding the Fourth Proportional to 90,009,343.40, 135,014,015.10 and 86,230,207.40

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Solution

The fourth proportional to 90,009,343.40, 135,014,015.10 and 86,230,207.40 is: 129,345,311.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,009,343.40 : 135,014,015.10 = 86,230,207.40 : x
  2. Step 2: Convert to fraction form
    90,009,343.40/135,014,015.10 = 86,230,207.40/x
  3. Step 3: Cross multiply
    90,009,343.40x = 135,014,015.10 × 86,230,207.40
  4. Step 4: Simplify right side
    90,009,343.40x = 11,642,286,523,979,732
  5. Step 5: Solve for x
    x = 11,642,286,523,979,732/90,009,343.40
  6. Step 6: Final answer
    x = 129,345,311.10

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1.5x scale

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.