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Finding the Fourth Proportional to 121,619.66, 167,870.43 and 70,643.93

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Solution

The fourth proportional to 121,619.66, 167,870.43 and 70,643.93 is: 97,509.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,619.66 : 167,870.43 = 70,643.93 : x
  2. Step 2: Convert to fraction form
    121,619.66/167,870.43 = 70,643.93/x
  3. Step 3: Cross multiply
    121,619.66x = 167,870.43 × 70,643.93
  4. Step 4: Simplify right side
    121,619.66x = 11,859,026,066.64
  5. Step 5: Solve for x
    x = 11,859,026,066.64/121,619.66
  6. Step 6: Final answer
    x = 97,509.12

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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.