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Finding the Fourth Proportional to 112,539.60, 168,809.40 and 70,549.20

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Solution

The fourth proportional to 112,539.60, 168,809.40 and 70,549.20 is: 105,823.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,539.60 : 168,809.40 = 70,549.20 : x
  2. Step 2: Convert to fraction form
    112,539.60/168,809.40 = 70,549.20/x
  3. Step 3: Cross multiply
    112,539.60x = 168,809.40 × 70,549.20
  4. Step 4: Simplify right side
    112,539.60x = 11,909,368,122.48
  5. Step 5: Solve for x
    x = 11,909,368,122.48/112,539.60
  6. Step 6: Final answer
    x = 105,823.80

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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.