Home / 128,259.42-176,997.45-71,670.79

Finding the Fourth Proportional to 128,259.42, 176,997.45 and 71,670.79

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Solution

The fourth proportional to 128,259.42, 176,997.45 and 71,670.79 is: 98,905.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,259.42 : 176,997.45 = 71,670.79 : x
  2. Step 2: Convert to fraction form
    128,259.42/176,997.45 = 71,670.79/x
  3. Step 3: Cross multiply
    128,259.42x = 176,997.45 × 71,670.79
  4. Step 4: Simplify right side
    128,259.42x = 12,685,547,069.49
  5. Step 5: Solve for x
    x = 12,685,547,069.49/128,259.42
  6. Step 6: Final answer
    x = 98,905.38

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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.