Home / 128,477.18-177,303.48-71,887.34

Finding the Fourth Proportional to 128,477.18, 177,303.48 and 71,887.34

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Solution

The fourth proportional to 128,477.18, 177,303.48 and 71,887.34 is: 99,207.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,477.18 : 177,303.48 = 71,887.34 : x
  2. Step 2: Convert to fraction form
    128,477.18/177,303.48 = 71,887.34/x
  3. Step 3: Cross multiply
    128,477.18x = 177,303.48 × 71,887.34
  4. Step 4: Simplify right side
    128,477.18x = 12,745,875,549.94
  5. Step 5: Solve for x
    x = 12,745,875,549.94/128,477.18
  6. Step 6: Final answer
    x = 99,207.31

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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.