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Finding the Fourth Proportional to 112,991.40, 155,929.92 and 65,248.92

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Solution

The fourth proportional to 112,991.40, 155,929.92 and 65,248.92 is: 90,044.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,991.40 : 155,929.92 = 65,248.92 : x
  2. Step 2: Convert to fraction form
    112,991.40/155,929.92 = 65,248.92/x
  3. Step 3: Cross multiply
    112,991.40x = 155,929.92 × 65,248.92
  4. Step 4: Simplify right side
    112,991.40x = 10,174,258,875.69
  5. Step 5: Solve for x
    x = 10,174,258,875.69/112,991.40
  6. Step 6: Final answer
    x = 90,044.54

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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.