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Finding the Fourth Proportional to 128,637.69, 177,460.23 and 83,330.95

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Solution

The fourth proportional to 128,637.69, 177,460.23 and 83,330.95 is: 114,957.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,637.69 : 177,460.23 = 83,330.95 : x
  2. Step 2: Convert to fraction form
    128,637.69/177,460.23 = 83,330.95/x
  3. Step 3: Cross multiply
    128,637.69x = 177,460.23 × 83,330.95
  4. Step 4: Simplify right side
    128,637.69x = 14,787,929,109.47
  5. Step 5: Solve for x
    x = 14,787,929,109.47/128,637.69
  6. Step 6: Final answer
    x = 114,957.98

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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.