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Finding the Fourth Proportional to 99,862.60, 149,405.10 and 64,870.60

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Solution

The fourth proportional to 99,862.60, 149,405.10 and 64,870.60 is: 97,053.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,862.60 : 149,405.10 = 64,870.60 : x
  2. Step 2: Convert to fraction form
    99,862.60/149,405.10 = 64,870.60/x
  3. Step 3: Cross multiply
    99,862.60x = 149,405.10 × 64,870.60
  4. Step 4: Simplify right side
    99,862.60x = 9,691,998,480.06
  5. Step 5: Solve for x
    x = 9,691,998,480.06/99,862.60
  6. Step 6: Final answer
    x = 97,053.34

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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.