Home / 128,258-176,996.04-71,669.40

Finding the Fourth Proportional to 128,258, 176,996.04 and 71,669.40

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Solution

The fourth proportional to 128,258, 176,996.04 and 71,669.40 is: 98,903.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,258 : 176,996.04 = 71,669.40 : x
  2. Step 2: Convert to fraction form
    128,258/176,996.04 = 71,669.40/x
  3. Step 3: Cross multiply
    128,258x = 176,996.04 × 71,669.40
  4. Step 4: Simplify right side
    128,258x = 12,685,199,989.18
  5. Step 5: Solve for x
    x = 12,685,199,989.18/128,258
  6. Step 6: Final answer
    x = 98,903.77

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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.