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Finding the Fourth Proportional to 93,155, 128,586.30 and 55,428.44

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Solution

The fourth proportional to 93,155, 128,586.30 and 55,428.44 is: 76,510.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,155 : 128,586.30 = 55,428.44 : x
  2. Step 2: Convert to fraction form
    93,155/128,586.30 = 55,428.44/x
  3. Step 3: Cross multiply
    93,155x = 128,586.30 × 55,428.44
  4. Step 4: Simplify right side
    93,155x = 7,127,338,014.37
  5. Step 5: Solve for x
    x = 7,127,338,014.37/93,155
  6. Step 6: Final answer
    x = 76,510.53

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1.5x scale

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.