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Finding the Fourth Proportional to 77,931.51, 107,545.51 and 43,940.07

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Solution

The fourth proportional to 77,931.51, 107,545.51 and 43,940.07 is: 60,637.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,931.51 : 107,545.51 = 43,940.07 : x
  2. Step 2: Convert to fraction form
    77,931.51/107,545.51 = 43,940.07/x
  3. Step 3: Cross multiply
    77,931.51x = 107,545.51 × 43,940.07
  4. Step 4: Simplify right side
    77,931.51x = 4,725,556,480.16
  5. Step 5: Solve for x
    x = 4,725,556,480.16/77,931.51
  6. Step 6: Final answer
    x = 60,637.30

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1.5x scale

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.