Home / 85,878,115.30-128,817,172.95-68,872,003.30

Finding the Fourth Proportional to 85,878,115.30, 128,817,172.95 and 68,872,003.30

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Solution

The fourth proportional to 85,878,115.30, 128,817,172.95 and 68,872,003.30 is: 103,308,004.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,878,115.30 : 128,817,172.95 = 68,872,003.30 : x
  2. Step 2: Convert to fraction form
    85,878,115.30/128,817,172.95 = 68,872,003.30/x
  3. Step 3: Cross multiply
    85,878,115.30x = 128,817,172.95 × 68,872,003.30
  4. Step 4: Simplify right side
    85,878,115.30x = 8,871,896,760,509,071
  5. Step 5: Solve for x
    x = 8,871,896,760,509,071/85,878,115.30
  6. Step 6: Final answer
    x = 103,308,004.95

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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.