Home / 128,342.95-177,160.16-77,357.50

Finding the Fourth Proportional to 128,342.95, 177,160.16 and 77,357.50

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Solution

The fourth proportional to 128,342.95, 177,160.16 and 77,357.50 is: 106,781.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,342.95 : 177,160.16 = 77,357.50 : x
  2. Step 2: Convert to fraction form
    128,342.95/177,160.16 = 77,357.50/x
  3. Step 3: Cross multiply
    128,342.95x = 177,160.16 × 77,357.50
  4. Step 4: Simplify right side
    128,342.95x = 13,704,666,827.69
  5. Step 5: Solve for x
    x = 13,704,666,827.69/128,342.95
  6. Step 6: Final answer
    x = 106,781.61

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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.