Home / 128,966.04-177,988.32-77,972.76

Finding the Fourth Proportional to 128,966.04, 177,988.32 and 77,972.76

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Solution

The fourth proportional to 128,966.04, 177,988.32 and 77,972.76 is: 107,611.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,966.04 : 177,988.32 = 77,972.76 : x
  2. Step 2: Convert to fraction form
    128,966.04/177,988.32 = 77,972.76/x
  3. Step 3: Cross multiply
    128,966.04x = 177,988.32 × 77,972.76
  4. Step 4: Simplify right side
    128,966.04x = 13,878,240,558.16
  5. Step 5: Solve for x
    x = 13,878,240,558.16/128,966.04
  6. Step 6: Final answer
    x = 107,611.59

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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.