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Finding the Fourth Proportional to 130,388, 179,935.60 and 70,772

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Solution

The fourth proportional to 130,388, 179,935.60 and 70,772 is: 97,665.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,388 : 179,935.60 = 70,772 : x
  2. Step 2: Convert to fraction form
    130,388/179,935.60 = 70,772/x
  3. Step 3: Cross multiply
    130,388x = 179,935.60 × 70,772
  4. Step 4: Simplify right side
    130,388x = 12,734,402,283.20
  5. Step 5: Solve for x
    x = 12,734,402,283.20/130,388
  6. Step 6: Final answer
    x = 97,665.45

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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.