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Finding the Fourth Proportional to 112,503.40, 155,264.10 and 64,772.20

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Solution

The fourth proportional to 112,503.40, 155,264.10 and 64,772.20 is: 89,391.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,503.40 : 155,264.10 = 64,772.20 : x
  2. Step 2: Convert to fraction form
    112,503.40/155,264.10 = 64,772.20/x
  3. Step 3: Cross multiply
    112,503.40x = 155,264.10 × 64,772.20
  4. Step 4: Simplify right side
    112,503.40x = 10,056,797,338.02
  5. Step 5: Solve for x
    x = 10,056,797,338.02/112,503.40
  6. Step 6: Final answer
    x = 89,391.05

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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.