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Finding the Fourth Proportional to 93,444.82, 128,970.57 and 55,721.50

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Solution

The fourth proportional to 93,444.82, 128,970.57 and 55,721.50 is: 76,905.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,444.82 : 128,970.57 = 55,721.50 : x
  2. Step 2: Convert to fraction form
    93,444.82/128,970.57 = 55,721.50/x
  3. Step 3: Cross multiply
    93,444.82x = 128,970.57 × 55,721.50
  4. Step 4: Simplify right side
    93,444.82x = 7,186,433,616.26
  5. Step 5: Solve for x
    x = 7,186,433,616.26/93,444.82
  6. Step 6: Final answer
    x = 76,905.64

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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.