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Finding the Fourth Proportional to 53,312.68, 79,968.62 and 21,715.32

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Solution

The fourth proportional to 53,312.68, 79,968.62 and 21,715.32 is: 32,572.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,312.68 : 79,968.62 = 21,715.32 : x
  2. Step 2: Convert to fraction form
    53,312.68/79,968.62 = 21,715.32/x
  3. Step 3: Cross multiply
    53,312.68x = 79,968.62 × 21,715.32
  4. Step 4: Simplify right side
    53,312.68x = 1,736,544,173.26
  5. Step 5: Solve for x
    x = 1,736,544,173.26/53,312.68
  6. Step 6: Final answer
    x = 32,572.82

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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.