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Finding the Fourth Proportional to 42,699.40, 64,010.70 and 27,915.40

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Solution

The fourth proportional to 42,699.40, 64,010.70 and 27,915.40 is: 41,848.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,699.40 : 64,010.70 = 27,915.40 : x
  2. Step 2: Convert to fraction form
    42,699.40/64,010.70 = 27,915.40/x
  3. Step 3: Cross multiply
    42,699.40x = 64,010.70 × 27,915.40
  4. Step 4: Simplify right side
    42,699.40x = 1,786,884,294.78
  5. Step 5: Solve for x
    x = 1,786,884,294.78/42,699.40
  6. Step 6: Final answer
    x = 41,848.00

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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.