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Finding the Fourth Proportional to 103,491.40, 142,750.74 and 84,598.60

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Solution

The fourth proportional to 103,491.40, 142,750.74 and 84,598.60 is: 116,690.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,491.40 : 142,750.74 = 84,598.60 : x
  2. Step 2: Convert to fraction form
    103,491.40/142,750.74 = 84,598.60/x
  3. Step 3: Cross multiply
    103,491.40x = 142,750.74 × 84,598.60
  4. Step 4: Simplify right side
    103,491.40x = 12,076,512,752.96
  5. Step 5: Solve for x
    x = 12,076,512,752.96/103,491.40
  6. Step 6: Final answer
    x = 116,690.98

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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.