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Finding the Fourth Proportional to 124,709.60, 187,064.40 and 85,343.60

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Solution

The fourth proportional to 124,709.60, 187,064.40 and 85,343.60 is: 128,015.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,709.60 : 187,064.40 = 85,343.60 : x
  2. Step 2: Convert to fraction form
    124,709.60/187,064.40 = 85,343.60/x
  3. Step 3: Cross multiply
    124,709.60x = 187,064.40 × 85,343.60
  4. Step 4: Simplify right side
    124,709.60x = 15,964,749,327.84
  5. Step 5: Solve for x
    x = 15,964,749,327.84/124,709.60
  6. Step 6: Final answer
    x = 128,015.40

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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.