Home / 128,748.07-177,637.12-77,044.35

Finding the Fourth Proportional to 128,748.07, 177,637.12 and 77,044.35

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Solution

The fourth proportional to 128,748.07, 177,637.12 and 77,044.35 is: 106,300.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,748.07 : 177,637.12 = 77,044.35 : x
  2. Step 2: Convert to fraction form
    128,748.07/177,637.12 = 77,044.35/x
  3. Step 3: Cross multiply
    128,748.07x = 177,637.12 × 77,044.35
  4. Step 4: Simplify right side
    128,748.07x = 13,685,936,446.27
  5. Step 5: Solve for x
    x = 13,685,936,446.27/128,748.07
  6. Step 6: Final answer
    x = 106,300.13

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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.