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Finding the Fourth Proportional to 102,989.60, 154,484.40 and 58,752.80

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Solution

The fourth proportional to 102,989.60, 154,484.40 and 58,752.80 is: 88,129.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,989.60 : 154,484.40 = 58,752.80 : x
  2. Step 2: Convert to fraction form
    102,989.60/154,484.40 = 58,752.80/x
  3. Step 3: Cross multiply
    102,989.60x = 154,484.40 × 58,752.80
  4. Step 4: Simplify right side
    102,989.60x = 9,076,391,056.32
  5. Step 5: Solve for x
    x = 9,076,391,056.32/102,989.60
  6. Step 6: Final answer
    x = 88,129.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.