Home / 128,851.04-177,814.10-72,263.64

Finding the Fourth Proportional to 128,851.04, 177,814.10 and 72,263.64

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Solution

The fourth proportional to 128,851.04, 177,814.10 and 72,263.64 is: 99,723.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,851.04 : 177,814.10 = 72,263.64 : x
  2. Step 2: Convert to fraction form
    128,851.04/177,814.10 = 72,263.64/x
  3. Step 3: Cross multiply
    128,851.04x = 177,814.10 × 72,263.64
  4. Step 4: Simplify right side
    128,851.04x = 12,849,494,109.32
  5. Step 5: Solve for x
    x = 12,849,494,109.32/128,851.04
  6. Step 6: Final answer
    x = 99,723.64

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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.