Home / 85,878,104.80-128,817,157.20-68,871,992.80

Finding the Fourth Proportional to 85,878,104.80, 128,817,157.20 and 68,871,992.80

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Solution

The fourth proportional to 85,878,104.80, 128,817,157.20 and 68,871,992.80 is: 103,307,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,878,104.80 : 128,817,157.20 = 68,871,992.80 : x
  2. Step 2: Convert to fraction form
    85,878,104.80/128,817,157.20 = 68,871,992.80/x
  3. Step 3: Cross multiply
    85,878,104.80x = 128,817,157.20 × 68,871,992.80
  4. Step 4: Simplify right side
    85,878,104.80x = 8,871,894,323,194,868
  5. Step 5: Solve for x
    x = 8,871,894,323,194,868/85,878,104.80
  6. Step 6: Final answer
    x = 103,307,989.20

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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.