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Finding the Fourth Proportional to 72,007.80, 99,423.90 and 43,751.40

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Solution

The fourth proportional to 72,007.80, 99,423.90 and 43,751.40 is: 60,409.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,007.80 : 99,423.90 = 43,751.40 : x
  2. Step 2: Convert to fraction form
    72,007.80/99,423.90 = 43,751.40/x
  3. Step 3: Cross multiply
    72,007.80x = 99,423.90 × 43,751.40
  4. Step 4: Simplify right side
    72,007.80x = 4,349,934,818.46
  5. Step 5: Solve for x
    x = 4,349,934,818.46/72,007.80
  6. Step 6: Final answer
    x = 60,409.22

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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.