Home / 72,223.59-99,665.61-42,009.78

Finding the Fourth Proportional to 72,223.59, 99,665.61 and 42,009.78

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Solution

The fourth proportional to 72,223.59, 99,665.61 and 42,009.78 is: 57,971.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,223.59 : 99,665.61 = 42,009.78 : x
  2. Step 2: Convert to fraction form
    72,223.59/99,665.61 = 42,009.78/x
  3. Step 3: Cross multiply
    72,223.59x = 99,665.61 × 42,009.78
  4. Step 4: Simplify right side
    72,223.59x = 4,186,930,349.67
  5. Step 5: Solve for x
    x = 4,186,930,349.67/72,223.59
  6. Step 6: Final answer
    x = 57,971.78

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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.