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Finding the Fourth Proportional to 70,892.40, 97,831.20 and 39,061.20

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Solution

The fourth proportional to 70,892.40, 97,831.20 and 39,061.20 is: 53,904.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,892.40 : 97,831.20 = 39,061.20 : x
  2. Step 2: Convert to fraction form
    70,892.40/97,831.20 = 39,061.20/x
  3. Step 3: Cross multiply
    70,892.40x = 97,831.20 × 39,061.20
  4. Step 4: Simplify right side
    70,892.40x = 3,821,404,069.44
  5. Step 5: Solve for x
    x = 3,821,404,069.44/70,892.40
  6. Step 6: Final answer
    x = 53,904.28

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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.