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Finding the Fourth Proportional to 100,898.47, 139,094.44 and 70,589.89

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Solution

The fourth proportional to 100,898.47, 139,094.44 and 70,589.89 is: 97,312.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,898.47 : 139,094.44 = 70,589.89 : x
  2. Step 2: Convert to fraction form
    100,898.47/139,094.44 = 70,589.89/x
  3. Step 3: Cross multiply
    100,898.47x = 139,094.44 × 70,589.89
  4. Step 4: Simplify right side
    100,898.47x = 9,818,661,219.21
  5. Step 5: Solve for x
    x = 9,818,661,219.21/100,898.47
  6. Step 6: Final answer
    x = 97,312.29

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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.