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Finding the Fourth Proportional to 70,830.55, 97,745.93 and 38,999.45

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Solution

The fourth proportional to 70,830.55, 97,745.93 and 38,999.45 is: 53,819.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,830.55 : 97,745.93 = 38,999.45 : x
  2. Step 2: Convert to fraction form
    70,830.55/97,745.93 = 38,999.45/x
  3. Step 3: Cross multiply
    70,830.55x = 97,745.93 × 38,999.45
  4. Step 4: Simplify right side
    70,830.55x = 3,812,037,509.74
  5. Step 5: Solve for x
    x = 3,812,037,509.74/70,830.55
  6. Step 6: Final answer
    x = 53,819.12

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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.