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Finding the Fourth Proportional to 99,807.37, 137,384.57 and 87,038.02

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Solution

The fourth proportional to 99,807.37, 137,384.57 and 87,038.02 is: 119,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,807.37 : 137,384.57 = 87,038.02 : x
  2. Step 2: Convert to fraction form
    99,807.37/137,384.57 = 87,038.02/x
  3. Step 3: Cross multiply
    99,807.37x = 137,384.57 × 87,038.02
  4. Step 4: Simplify right side
    99,807.37x = 11,957,680,951.35
  5. Step 5: Solve for x
    x = 11,957,680,951.35/99,807.37
  6. Step 6: Final answer
    x = 119,807.60

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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.