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Finding the Fourth Proportional to 115,975.70, 160,056.28 and 64,987.84

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Solution

The fourth proportional to 115,975.70, 160,056.28 and 64,987.84 is: 89,688.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,975.70 : 160,056.28 = 64,987.84 : x
  2. Step 2: Convert to fraction form
    115,975.70/160,056.28 = 64,987.84/x
  3. Step 3: Cross multiply
    115,975.70x = 160,056.28 × 64,987.84
  4. Step 4: Simplify right side
    115,975.70x = 10,401,712,464.32
  5. Step 5: Solve for x
    x = 10,401,712,464.32/115,975.70
  6. Step 6: Final answer
    x = 89,688.72

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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.