Home / 128,368.68-192,478.91-39,598.35

Finding the Fourth Proportional to 128,368.68, 192,478.91 and 39,598.35

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Solution

The fourth proportional to 128,368.68, 192,478.91 and 39,598.35 is: 59,374.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,368.68 : 192,478.91 = 39,598.35 : x
  2. Step 2: Convert to fraction form
    128,368.68/192,478.91 = 39,598.35/x
  3. Step 3: Cross multiply
    128,368.68x = 192,478.91 × 39,598.35
  4. Step 4: Simplify right side
    128,368.68x = 7,621,847,047.81
  5. Step 5: Solve for x
    x = 7,621,847,047.81/128,368.68
  6. Step 6: Final answer
    x = 59,374.66

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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.