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Finding the Fourth Proportional to 52,677.60, 78,886.80 and 39,458.40

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Solution

The fourth proportional to 52,677.60, 78,886.80 and 39,458.40 is: 59,090.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,677.60 : 78,886.80 = 39,458.40 : x
  2. Step 2: Convert to fraction form
    52,677.60/78,886.80 = 39,458.40/x
  3. Step 3: Cross multiply
    52,677.60x = 78,886.80 × 39,458.40
  4. Step 4: Simplify right side
    52,677.60x = 3,112,746,909.12
  5. Step 5: Solve for x
    x = 3,112,746,909.12/52,677.60
  6. Step 6: Final answer
    x = 59,090.52

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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.