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Finding the Fourth Proportional to 99,979.99, 149,803.90 and 70,335.54

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Solution

The fourth proportional to 99,979.99, 149,803.90 and 70,335.54 is: 105,386.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,979.99 : 149,803.90 = 70,335.54 : x
  2. Step 2: Convert to fraction form
    99,979.99/149,803.90 = 70,335.54/x
  3. Step 3: Cross multiply
    99,979.99x = 149,803.90 × 70,335.54
  4. Step 4: Simplify right side
    99,979.99x = 10,536,538,024.77
  5. Step 5: Solve for x
    x = 10,536,538,024.77/99,979.99
  6. Step 6: Final answer
    x = 105,386.47

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1.5x scale

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.