Home / 143,136.76-215,710.45-128,923.08

Finding the Fourth Proportional to 143,136.76, 215,710.45 and 128,923.08

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Solution

The fourth proportional to 143,136.76, 215,710.45 and 128,923.08 is: 194,290.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,136.76 : 215,710.45 = 128,923.08 : x
  2. Step 2: Convert to fraction form
    143,136.76/215,710.45 = 128,923.08/x
  3. Step 3: Cross multiply
    143,136.76x = 215,710.45 × 128,923.08
  4. Step 4: Simplify right side
    143,136.76x = 27,810,055,602.19
  5. Step 5: Solve for x
    x = 27,810,055,602.19/143,136.76
  6. Step 6: Final answer
    x = 194,290.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.