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Finding the Fourth Proportional to 99,640.55, 139,600.45 and 99,640.55

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Solution

The fourth proportional to 99,640.55, 139,600.45 and 99,640.55 is: 139,600.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,640.55 : 139,600.45 = 99,640.55 : x
  2. Step 2: Convert to fraction form
    99,640.55/139,600.45 = 99,640.55/x
  3. Step 3: Cross multiply
    99,640.55x = 139,600.45 × 99,640.55
  4. Step 4: Simplify right side
    99,640.55x = 13,909,865,618.25
  5. Step 5: Solve for x
    x = 13,909,865,618.25/99,640.55
  6. Step 6: Final answer
    x = 139,600.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.