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Finding the Fourth Proportional to 128,068.31, 176,729.96 and 70,706.67

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Solution

The fourth proportional to 128,068.31, 176,729.96 and 70,706.67 is: 97,572.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,068.31 : 176,729.96 = 70,706.67 : x
  2. Step 2: Convert to fraction form
    128,068.31/176,729.96 = 70,706.67/x
  3. Step 3: Cross multiply
    128,068.31x = 176,729.96 × 70,706.67
  4. Step 4: Simplify right side
    128,068.31x = 12,495,987,137.60
  5. Step 5: Solve for x
    x = 12,495,987,137.60/128,068.31
  6. Step 6: Final answer
    x = 97,572.83

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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.