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Finding the Fourth Proportional to 121,798.63, 168,070.29 and 76,462.12

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Solution

The fourth proportional to 121,798.63, 168,070.29 and 76,462.12 is: 105,510.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,798.63 : 168,070.29 = 76,462.12 : x
  2. Step 2: Convert to fraction form
    121,798.63/168,070.29 = 76,462.12/x
  3. Step 3: Cross multiply
    121,798.63x = 168,070.29 × 76,462.12
  4. Step 4: Simplify right side
    121,798.63x = 12,851,009,842.06
  5. Step 5: Solve for x
    x = 12,851,009,842.06/121,798.63
  6. Step 6: Final answer
    x = 105,510.30

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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.