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Finding the Fourth Proportional to 96,709,868.80, 145,064,803.20 and 67,988,435.20

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Solution

The fourth proportional to 96,709,868.80, 145,064,803.20 and 67,988,435.20 is: 101,982,652.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,709,868.80 : 145,064,803.20 = 67,988,435.20 : x
  2. Step 2: Convert to fraction form
    96,709,868.80/145,064,803.20 = 67,988,435.20/x
  3. Step 3: Cross multiply
    96,709,868.80x = 145,064,803.20 × 67,988,435.20
  4. Step 4: Simplify right side
    96,709,868.80x = 9,862,728,972,163,952
  5. Step 5: Solve for x
    x = 9,862,728,972,163,952/96,709,868.80
  6. Step 6: Final answer
    x = 101,982,652.80

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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.