Home / 128,258.16-176,995.98-71,669.54

Finding the Fourth Proportional to 128,258.16, 176,995.98 and 71,669.54

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Solution

The fourth proportional to 128,258.16, 176,995.98 and 71,669.54 is: 98,903.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,258.16 : 176,995.98 = 71,669.54 : x
  2. Step 2: Convert to fraction form
    128,258.16/176,995.98 = 71,669.54/x
  3. Step 3: Cross multiply
    128,258.16x = 176,995.98 × 71,669.54
  4. Step 4: Simplify right side
    128,258.16x = 12,685,219,583.47
  5. Step 5: Solve for x
    x = 12,685,219,583.47/128,258.16
  6. Step 6: Final answer
    x = 98,903.80

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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.