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Finding the Fourth Proportional to 93,336.80, 139,810.80 and 77,784.80

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Solution

The fourth proportional to 93,336.80, 139,810.80 and 77,784.80 is: 116,515.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,336.80 : 139,810.80 = 77,784.80 : x
  2. Step 2: Convert to fraction form
    93,336.80/139,810.80 = 77,784.80/x
  3. Step 3: Cross multiply
    93,336.80x = 139,810.80 × 77,784.80
  4. Step 4: Simplify right side
    93,336.80x = 10,875,155,115.84
  5. Step 5: Solve for x
    x = 10,875,155,115.84/93,336.80
  6. Step 6: Final answer
    x = 116,515.19

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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.