Home / 128,430.15-192,591.01-38,485.62

Finding the Fourth Proportional to 128,430.15, 192,591.01 and 38,485.62

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Solution

The fourth proportional to 128,430.15, 192,591.01 and 38,485.62 is: 57,712.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,430.15 : 192,591.01 = 38,485.62 : x
  2. Step 2: Convert to fraction form
    128,430.15/192,591.01 = 38,485.62/x
  3. Step 3: Cross multiply
    128,430.15x = 192,591.01 × 38,485.62
  4. Step 4: Simplify right side
    128,430.15x = 7,411,984,426.28
  5. Step 5: Solve for x
    x = 7,411,984,426.28/128,430.15
  6. Step 6: Final answer
    x = 57,712.18

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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.