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Finding the Fourth Proportional to 103,710.60, 143,100.54 and 61,276.32

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Solution

The fourth proportional to 103,710.60, 143,100.54 and 61,276.32 is: 84,549.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,710.60 : 143,100.54 = 61,276.32 : x
  2. Step 2: Convert to fraction form
    103,710.60/143,100.54 = 61,276.32/x
  3. Step 3: Cross multiply
    103,710.60x = 143,100.54 × 61,276.32
  4. Step 4: Simplify right side
    103,710.60x = 8,768,674,481.21
  5. Step 5: Solve for x
    x = 8,768,674,481.21/103,710.60
  6. Step 6: Final answer
    x = 84,549.45

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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.