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Finding the Fourth Proportional to 128,065.64, 176,730.48 and 70,705.04

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Solution

The fourth proportional to 128,065.64, 176,730.48 and 70,705.04 is: 97,572.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,065.64 : 176,730.48 = 70,705.04 : x
  2. Step 2: Convert to fraction form
    128,065.64/176,730.48 = 70,705.04/x
  3. Step 3: Cross multiply
    128,065.64x = 176,730.48 × 70,705.04
  4. Step 4: Simplify right side
    128,065.64x = 12,495,735,657.62
  5. Step 5: Solve for x
    x = 12,495,735,657.62/128,065.64
  6. Step 6: Final answer
    x = 97,572.90

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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.