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Finding the Fourth Proportional to 118,428.92, 163,429.94 and 64,712.71

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Solution

The fourth proportional to 118,428.92, 163,429.94 and 64,712.71 is: 89,302.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,428.92 : 163,429.94 = 64,712.71 : x
  2. Step 2: Convert to fraction form
    118,428.92/163,429.94 = 64,712.71/x
  3. Step 3: Cross multiply
    118,428.92x = 163,429.94 × 64,712.71
  4. Step 4: Simplify right side
    118,428.92x = 10,575,994,312.54
  5. Step 5: Solve for x
    x = 10,575,994,312.54/118,428.92
  6. Step 6: Final answer
    x = 89,302.46

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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.