Home / 86,915.25-130,152.34-72,838.26

Finding the Fourth Proportional to 86,915.25, 130,152.34 and 72,838.26

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Solution

The fourth proportional to 86,915.25, 130,152.34 and 72,838.26 is: 109,072.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,915.25 : 130,152.34 = 72,838.26 : x
  2. Step 2: Convert to fraction form
    86,915.25/130,152.34 = 72,838.26/x
  3. Step 3: Cross multiply
    86,915.25x = 130,152.34 × 72,838.26
  4. Step 4: Simplify right side
    86,915.25x = 9,480,069,980.53
  5. Step 5: Solve for x
    x = 9,480,069,980.53/86,915.25
  6. Step 6: Final answer
    x = 109,072.57

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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.