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Finding the Fourth Proportional to 100,995.40, 139,461.78 and 63,334.60

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Solution

The fourth proportional to 100,995.40, 139,461.78 and 63,334.60 is: 87,457.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,995.40 : 139,461.78 = 63,334.60 : x
  2. Step 2: Convert to fraction form
    100,995.40/139,461.78 = 63,334.60/x
  3. Step 3: Cross multiply
    100,995.40x = 139,461.78 × 63,334.60
  4. Step 4: Simplify right side
    100,995.40x = 8,832,756,051.59
  5. Step 5: Solve for x
    x = 8,832,756,051.59/100,995.40
  6. Step 6: Final answer
    x = 87,457.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.