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Finding the Fourth Proportional to 116,915.40, 161,341.07 and 65,927.32

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Solution

The fourth proportional to 116,915.40, 161,341.07 and 65,927.32 is: 90,978.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,915.40 : 161,341.07 = 65,927.32 : x
  2. Step 2: Convert to fraction form
    116,915.40/161,341.07 = 65,927.32/x
  3. Step 3: Cross multiply
    116,915.40x = 161,341.07 × 65,927.32
  4. Step 4: Simplify right side
    116,915.40x = 10,636,783,618.04
  5. Step 5: Solve for x
    x = 10,636,783,618.04/116,915.40
  6. Step 6: Final answer
    x = 90,978.46

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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.