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Finding the Fourth Proportional to 74,218.40, 111,316.80 and 21,622.40

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Solution

The fourth proportional to 74,218.40, 111,316.80 and 21,622.40 is: 32,430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,218.40 : 111,316.80 = 21,622.40 : x
  2. Step 2: Convert to fraction form
    74,218.40/111,316.80 = 21,622.40/x
  3. Step 3: Cross multiply
    74,218.40x = 111,316.80 × 21,622.40
  4. Step 4: Simplify right side
    74,218.40x = 2,406,936,376.32
  5. Step 5: Solve for x
    x = 2,406,936,376.32/74,218.40
  6. Step 6: Final answer
    x = 32,430.45

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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.