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Finding the Fourth Proportional to 118,862.80, 164,009.16 and 76,411.60

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Solution

The fourth proportional to 118,862.80, 164,009.16 and 76,411.60 is: 105,434.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,862.80 : 164,009.16 = 76,411.60 : x
  2. Step 2: Convert to fraction form
    118,862.80/164,009.16 = 76,411.60/x
  3. Step 3: Cross multiply
    118,862.80x = 164,009.16 × 76,411.60
  4. Step 4: Simplify right side
    118,862.80x = 12,532,202,330.26
  5. Step 5: Solve for x
    x = 12,532,202,330.26/118,862.80
  6. Step 6: Final answer
    x = 105,434.18

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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.