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Finding the Fourth Proportional to 65,220.70, 97,831.05 and 42,670.30

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Solution

The fourth proportional to 65,220.70, 97,831.05 and 42,670.30 is: 64,005.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,220.70 : 97,831.05 = 42,670.30 : x
  2. Step 2: Convert to fraction form
    65,220.70/97,831.05 = 42,670.30/x
  3. Step 3: Cross multiply
    65,220.70x = 97,831.05 × 42,670.30
  4. Step 4: Simplify right side
    65,220.70x = 4,174,480,252.82
  5. Step 5: Solve for x
    x = 4,174,480,252.82/65,220.70
  6. Step 6: Final answer
    x = 64,005.45

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Similar ratio
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1.5x scale

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.