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Finding the Fourth Proportional to 103,534.40, 142,705.40 and 73,280.90

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Solution

The fourth proportional to 103,534.40, 142,705.40 and 73,280.90 is: 101,005.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,534.40 : 142,705.40 = 73,280.90 : x
  2. Step 2: Convert to fraction form
    103,534.40/142,705.40 = 73,280.90/x
  3. Step 3: Cross multiply
    103,534.40x = 142,705.40 × 73,280.90
  4. Step 4: Simplify right side
    103,534.40x = 10,457,580,137.22
  5. Step 5: Solve for x
    x = 10,457,580,137.22/103,534.40
  6. Step 6: Final answer
    x = 101,005.85

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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.