Home / 105,332.54-145,272.30-75,108.20

Finding the Fourth Proportional to 105,332.54, 145,272.30 and 75,108.20

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Solution

The fourth proportional to 105,332.54, 145,272.30 and 75,108.20 is: 103,587.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,332.54 : 145,272.30 = 75,108.20 : x
  2. Step 2: Convert to fraction form
    105,332.54/145,272.30 = 75,108.20/x
  3. Step 3: Cross multiply
    105,332.54x = 145,272.30 × 75,108.20
  4. Step 4: Simplify right side
    105,332.54x = 10,911,140,962.86
  5. Step 5: Solve for x
    x = 10,911,140,962.86/105,332.54
  6. Step 6: Final answer
    x = 103,587.56

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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.