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Finding the Fourth Proportional to 128,186.72, 176,901.22 and 70,829.72

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Solution

The fourth proportional to 128,186.72, 176,901.22 and 70,829.72 is: 97,746.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,186.72 : 176,901.22 = 70,829.72 : x
  2. Step 2: Convert to fraction form
    128,186.72/176,901.22 = 70,829.72/x
  3. Step 3: Cross multiply
    128,186.72x = 176,901.22 × 70,829.72
  4. Step 4: Simplify right side
    128,186.72x = 12,529,863,880.26
  5. Step 5: Solve for x
    x = 12,529,863,880.26/128,186.72
  6. Step 6: Final answer
    x = 97,746.97

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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.