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Finding the Fourth Proportional to 128,063.76, 176,730.80 and 70,702.88

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Solution

The fourth proportional to 128,063.76, 176,730.80 and 70,702.88 is: 97,571.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,063.76 : 176,730.80 = 70,702.88 : x
  2. Step 2: Convert to fraction form
    128,063.76/176,730.80 = 70,702.88/x
  3. Step 3: Cross multiply
    128,063.76x = 176,730.80 × 70,702.88
  4. Step 4: Simplify right side
    128,063.76x = 12,495,376,544.70
  5. Step 5: Solve for x
    x = 12,495,376,544.70/128,063.76
  6. Step 6: Final answer
    x = 97,571.53

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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.