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Finding the Fourth Proportional to 115,484.54, 159,280.71 and 99,378.69

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Solution

The fourth proportional to 115,484.54, 159,280.71 and 99,378.69 is: 137,066.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,484.54 : 159,280.71 = 99,378.69 : x
  2. Step 2: Convert to fraction form
    115,484.54/159,280.71 = 99,378.69/x
  3. Step 3: Cross multiply
    115,484.54x = 159,280.71 × 99,378.69
  4. Step 4: Simplify right side
    115,484.54x = 15,829,107,741.79
  5. Step 5: Solve for x
    x = 15,829,107,741.79/115,484.54
  6. Step 6: Final answer
    x = 137,066.90

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1.5x scale

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.