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Finding the Fourth Proportional to 93,615.12, 139,698.18 and 83,646

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Solution

The fourth proportional to 93,615.12, 139,698.18 and 83,646 is: 124,821.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,615.12 : 139,698.18 = 83,646 : x
  2. Step 2: Convert to fraction form
    93,615.12/139,698.18 = 83,646/x
  3. Step 3: Cross multiply
    93,615.12x = 139,698.18 × 83,646
  4. Step 4: Simplify right side
    93,615.12x = 11,685,193,964.28
  5. Step 5: Solve for x
    x = 11,685,193,964.28/93,615.12
  6. Step 6: Final answer
    x = 124,821.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.