Home / 128,275.21-177,075.99-98,061.79

Finding the Fourth Proportional to 128,275.21, 177,075.99 and 98,061.79

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Solution

The fourth proportional to 128,275.21, 177,075.99 and 98,061.79 is: 135,368.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,275.21 : 177,075.99 = 98,061.79 : x
  2. Step 2: Convert to fraction form
    128,275.21/177,075.99 = 98,061.79/x
  3. Step 3: Cross multiply
    128,275.21x = 177,075.99 × 98,061.79
  4. Step 4: Simplify right side
    128,275.21x = 17,364,388,545.42
  5. Step 5: Solve for x
    x = 17,364,388,545.42/128,275.21
  6. Step 6: Final answer
    x = 135,368.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.