Home / 85,539,942.40-128,309,913.60-71,179,225.60

Finding the Fourth Proportional to 85,539,942.40, 128,309,913.60 and 71,179,225.60

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Solution

The fourth proportional to 85,539,942.40, 128,309,913.60 and 71,179,225.60 is: 106,768,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,539,942.40 : 128,309,913.60 = 71,179,225.60 : x
  2. Step 2: Convert to fraction form
    85,539,942.40/128,309,913.60 = 71,179,225.60/x
  3. Step 3: Cross multiply
    85,539,942.40x = 128,309,913.60 × 71,179,225.60
  4. Step 4: Simplify right side
    85,539,942.40x = 9,133,000,286,850,906
  5. Step 5: Solve for x
    x = 9,133,000,286,850,906/85,539,942.40
  6. Step 6: Final answer
    x = 106,768,838.40

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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.