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Finding the Fourth Proportional to 121,898.95, 168,238.50 and 74,143.06

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Solution

The fourth proportional to 121,898.95, 168,238.50 and 74,143.06 is: 102,328.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,898.95 : 168,238.50 = 74,143.06 : x
  2. Step 2: Convert to fraction form
    121,898.95/168,238.50 = 74,143.06/x
  3. Step 3: Cross multiply
    121,898.95x = 168,238.50 × 74,143.06
  4. Step 4: Simplify right side
    121,898.95x = 12,473,717,199.81
  5. Step 5: Solve for x
    x = 12,473,717,199.81/121,898.95
  6. Step 6: Final answer
    x = 102,328.34

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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.