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Finding the Fourth Proportional to 140,507.40, 210,323.70 and 81,166.80

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Solution

The fourth proportional to 140,507.40, 210,323.70 and 81,166.80 is: 121,497.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,507.40 : 210,323.70 = 81,166.80 : x
  2. Step 2: Convert to fraction form
    140,507.40/210,323.70 = 81,166.80/x
  3. Step 3: Cross multiply
    140,507.40x = 210,323.70 × 81,166.80
  4. Step 4: Simplify right side
    140,507.40x = 17,071,301,693.16
  5. Step 5: Solve for x
    x = 17,071,301,693.16/140,507.40
  6. Step 6: Final answer
    x = 121,497.53

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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.