Home / 128,261.13-192,417.20-39,510.84

Finding the Fourth Proportional to 128,261.13, 192,417.20 and 39,510.84

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Solution

The fourth proportional to 128,261.13, 192,417.20 and 39,510.84 is: 59,274.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,261.13 : 192,417.20 = 39,510.84 : x
  2. Step 2: Convert to fraction form
    128,261.13/192,417.20 = 39,510.84/x
  3. Step 3: Cross multiply
    128,261.13x = 192,417.20 × 39,510.84
  4. Step 4: Simplify right side
    128,261.13x = 7,602,565,202.45
  5. Step 5: Solve for x
    x = 7,602,565,202.45/128,261.13
  6. Step 6: Final answer
    x = 59,274.12

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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.