Home / 105,140.68-145,146.18-64,876.63

Finding the Fourth Proportional to 105,140.68, 145,146.18 and 64,876.63

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Solution

The fourth proportional to 105,140.68, 145,146.18 and 64,876.63 is: 89,561.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,140.68 : 145,146.18 = 64,876.63 : x
  2. Step 2: Convert to fraction form
    105,140.68/145,146.18 = 64,876.63/x
  3. Step 3: Cross multiply
    105,140.68x = 145,146.18 × 64,876.63
  4. Step 4: Simplify right side
    105,140.68x = 9,416,595,015.77
  5. Step 5: Solve for x
    x = 9,416,595,015.77/105,140.68
  6. Step 6: Final answer
    x = 89,561.86

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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.