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Finding the Fourth Proportional to 53,880, 74,354.40 and 31,528.32

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Solution

The fourth proportional to 53,880, 74,354.40 and 31,528.32 is: 43,509.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,880 : 74,354.40 = 31,528.32 : x
  2. Step 2: Convert to fraction form
    53,880/74,354.40 = 31,528.32/x
  3. Step 3: Cross multiply
    53,880x = 74,354.40 × 31,528.32
  4. Step 4: Simplify right side
    53,880x = 2,344,269,316.61
  5. Step 5: Solve for x
    x = 2,344,269,316.61/53,880
  6. Step 6: Final answer
    x = 43,509.08

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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.