Home / 99,901.17-149,123.02-87,289.70

Finding the Fourth Proportional to 99,901.17, 149,123.02 and 87,289.70

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Solution

The fourth proportional to 99,901.17, 149,123.02 and 87,289.70 is: 130,297.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,901.17 : 149,123.02 = 87,289.70 : x
  2. Step 2: Convert to fraction form
    99,901.17/149,123.02 = 87,289.70/x
  3. Step 3: Cross multiply
    99,901.17x = 149,123.02 × 87,289.70
  4. Step 4: Simplify right side
    99,901.17x = 13,016,902,496.83
  5. Step 5: Solve for x
    x = 13,016,902,496.83/99,901.17
  6. Step 6: Final answer
    x = 130,297.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.