Home / 128,698.02-177,602.76-72,109.26

Finding the Fourth Proportional to 128,698.02, 177,602.76 and 72,109.26

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Solution

The fourth proportional to 128,698.02, 177,602.76 and 72,109.26 is: 99,510.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,698.02 : 177,602.76 = 72,109.26 : x
  2. Step 2: Convert to fraction form
    128,698.02/177,602.76 = 72,109.26/x
  3. Step 3: Cross multiply
    128,698.02x = 177,602.76 × 72,109.26
  4. Step 4: Simplify right side
    128,698.02x = 12,806,803,597.56
  5. Step 5: Solve for x
    x = 12,806,803,597.56/128,698.02
  6. Step 6: Final answer
    x = 99,510.49

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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.