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Finding the Fourth Proportional to 85,968,271.70, 128,952,407.55 and 57,120,866.90

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Solution

The fourth proportional to 85,968,271.70, 128,952,407.55 and 57,120,866.90 is: 85,681,300.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968,271.70 : 128,952,407.55 = 57,120,866.90 : x
  2. Step 2: Convert to fraction form
    85,968,271.70/128,952,407.55 = 57,120,866.90/x
  3. Step 3: Cross multiply
    85,968,271.70x = 128,952,407.55 × 57,120,866.90
  4. Step 4: Simplify right side
    85,968,271.70x = 7,365,873,308,098,105
  5. Step 5: Solve for x
    x = 7,365,873,308,098,105/85,968,271.70
  6. Step 6: Final answer
    x = 85,681,300.35

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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.