Home / 105,178.40-145,152.10-57,436.20

Finding the Fourth Proportional to 105,178.40, 145,152.10 and 57,436.20

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Solution

The fourth proportional to 105,178.40, 145,152.10 and 57,436.20 is: 79,265.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,178.40 : 145,152.10 = 57,436.20 : x
  2. Step 2: Convert to fraction form
    105,178.40/145,152.10 = 57,436.20/x
  3. Step 3: Cross multiply
    105,178.40x = 145,152.10 × 57,436.20
  4. Step 4: Simplify right side
    105,178.40x = 8,336,985,046.02
  5. Step 5: Solve for x
    x = 8,336,985,046.02/105,178.40
  6. Step 6: Final answer
    x = 79,265.18

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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.