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Finding the Fourth Proportional to 128,587.47, 192,881.25 and 58,486.83

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Solution

The fourth proportional to 128,587.47, 192,881.25 and 58,486.83 is: 87,730.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,587.47 : 192,881.25 = 58,486.83 : x
  2. Step 2: Convert to fraction form
    128,587.47/192,881.25 = 58,486.83/x
  3. Step 3: Cross multiply
    128,587.47x = 192,881.25 × 58,486.83
  4. Step 4: Simplify right side
    128,587.47x = 11,281,012,878.94
  5. Step 5: Solve for x
    x = 11,281,012,878.94/128,587.47
  6. Step 6: Final answer
    x = 87,730.27

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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.