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Finding the Fourth Proportional to 131,386.90, 181,313.90 and 70,957.54

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Solution

The fourth proportional to 131,386.90, 181,313.90 and 70,957.54 is: 97,921.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,386.90 : 181,313.90 = 70,957.54 : x
  2. Step 2: Convert to fraction form
    131,386.90/181,313.90 = 70,957.54/x
  3. Step 3: Cross multiply
    131,386.90x = 181,313.90 × 70,957.54
  4. Step 4: Simplify right side
    131,386.90x = 12,865,588,311.81
  5. Step 5: Solve for x
    x = 12,865,588,311.81/131,386.90
  6. Step 6: Final answer
    x = 97,921.39

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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.