Home / 128,457.60-192,707.04-39,690.24

Finding the Fourth Proportional to 128,457.60, 192,707.04 and 39,690.24

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Solution

The fourth proportional to 128,457.60, 192,707.04 and 39,690.24 is: 59,541.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,457.60 : 192,707.04 = 39,690.24 : x
  2. Step 2: Convert to fraction form
    128,457.60/192,707.04 = 39,690.24/x
  3. Step 3: Cross multiply
    128,457.60x = 192,707.04 × 39,690.24
  4. Step 4: Simplify right side
    128,457.60x = 7,648,588,667.29
  5. Step 5: Solve for x
    x = 7,648,588,667.29/128,457.60
  6. Step 6: Final answer
    x = 59,541.74

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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.