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Finding the Fourth Proportional to 60,315.20, 90,472.80 and 45,346.40

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Solution

The fourth proportional to 60,315.20, 90,472.80 and 45,346.40 is: 68,019.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,315.20 : 90,472.80 = 45,346.40 : x
  2. Step 2: Convert to fraction form
    60,315.20/90,472.80 = 45,346.40/x
  3. Step 3: Cross multiply
    60,315.20x = 90,472.80 × 45,346.40
  4. Step 4: Simplify right side
    60,315.20x = 4,102,615,777.92
  5. Step 5: Solve for x
    x = 4,102,615,777.92/60,315.20
  6. Step 6: Final answer
    x = 68,019.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.