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Finding the Fourth Proportional to 103,608.95, 142,980.57 and 61,170.21

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Solution

The fourth proportional to 103,608.95, 142,980.57 and 61,170.21 is: 84,415.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,608.95 : 142,980.57 = 61,170.21 : x
  2. Step 2: Convert to fraction form
    103,608.95/142,980.57 = 61,170.21/x
  3. Step 3: Cross multiply
    103,608.95x = 142,980.57 × 61,170.21
  4. Step 4: Simplify right side
    103,608.95x = 8,746,151,697.35
  5. Step 5: Solve for x
    x = 8,746,151,697.35/103,608.95
  6. Step 6: Final answer
    x = 84,415.02

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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.