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Finding the Fourth Proportional to 100,948, 139,308.24 and 58,531.20

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Solution

The fourth proportional to 100,948, 139,308.24 and 58,531.20 is: 80,773.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,948 : 139,308.24 = 58,531.20 : x
  2. Step 2: Convert to fraction form
    100,948/139,308.24 = 58,531.20/x
  3. Step 3: Cross multiply
    100,948x = 139,308.24 × 58,531.20
  4. Step 4: Simplify right side
    100,948x = 8,153,878,457.09
  5. Step 5: Solve for x
    x = 8,153,878,457.09/100,948
  6. Step 6: Final answer
    x = 80,773.06

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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.