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Finding the Fourth Proportional to 144,925.70, 217,388.55 and 85,730.90

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Solution

The fourth proportional to 144,925.70, 217,388.55 and 85,730.90 is: 128,596.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,925.70 : 217,388.55 = 85,730.90 : x
  2. Step 2: Convert to fraction form
    144,925.70/217,388.55 = 85,730.90/x
  3. Step 3: Cross multiply
    144,925.70x = 217,388.55 × 85,730.90
  4. Step 4: Simplify right side
    144,925.70x = 18,636,916,041.20
  5. Step 5: Solve for x
    x = 18,636,916,041.20/144,925.70
  6. Step 6: Final answer
    x = 128,596.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.