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Finding the Fourth Proportional to 65,878.48, 90,911.40 and 36,070.48

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Solution

The fourth proportional to 65,878.48, 90,911.40 and 36,070.48 is: 49,776.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,878.48 : 90,911.40 = 36,070.48 : x
  2. Step 2: Convert to fraction form
    65,878.48/90,911.40 = 36,070.48/x
  3. Step 3: Cross multiply
    65,878.48x = 90,911.40 × 36,070.48
  4. Step 4: Simplify right side
    65,878.48x = 3,279,217,835.47
  5. Step 5: Solve for x
    x = 3,279,217,835.47/65,878.48
  6. Step 6: Final answer
    x = 49,776.77

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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.