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Finding the Fourth Proportional to 71,307.60, 98,405.28 and 39,477.04

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Solution

The fourth proportional to 71,307.60, 98,405.28 and 39,477.04 is: 54,478.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,307.60 : 98,405.28 = 39,477.04 : x
  2. Step 2: Convert to fraction form
    71,307.60/98,405.28 = 39,477.04/x
  3. Step 3: Cross multiply
    71,307.60x = 98,405.28 × 39,477.04
  4. Step 4: Simplify right side
    71,307.60x = 3,884,749,174.77
  5. Step 5: Solve for x
    x = 3,884,749,174.77/71,307.60
  6. Step 6: Final answer
    x = 54,478.75

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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.