Home / 121,767.90-168,039.42-70,810.50

Finding the Fourth Proportional to 121,767.90, 168,039.42 and 70,810.50

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Solution

The fourth proportional to 121,767.90, 168,039.42 and 70,810.50 is: 97,718.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,767.90 : 168,039.42 = 70,810.50 : x
  2. Step 2: Convert to fraction form
    121,767.90/168,039.42 = 70,810.50/x
  3. Step 3: Cross multiply
    121,767.90x = 168,039.42 × 70,810.50
  4. Step 4: Simplify right side
    121,767.90x = 11,898,955,349.91
  5. Step 5: Solve for x
    x = 11,898,955,349.91/121,767.90
  6. Step 6: Final answer
    x = 97,718.33

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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.