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Finding the Fourth Proportional to 124,708.40, 187,062.60 and 72,090.80

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Solution

The fourth proportional to 124,708.40, 187,062.60 and 72,090.80 is: 108,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,708.40 : 187,062.60 = 72,090.80 : x
  2. Step 2: Convert to fraction form
    124,708.40/187,062.60 = 72,090.80/x
  3. Step 3: Cross multiply
    124,708.40x = 187,062.60 × 72,090.80
  4. Step 4: Simplify right side
    124,708.40x = 13,485,492,484.08
  5. Step 5: Solve for x
    x = 13,485,492,484.08/124,708.40
  6. Step 6: Final answer
    x = 108,136.20

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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.