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Finding the Fourth Proportional to 112,030.60, 168,045.90 and 86,661.40

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Solution

The fourth proportional to 112,030.60, 168,045.90 and 86,661.40 is: 129,992.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,030.60 : 168,045.90 = 86,661.40 : x
  2. Step 2: Convert to fraction form
    112,030.60/168,045.90 = 86,661.40/x
  3. Step 3: Cross multiply
    112,030.60x = 168,045.90 × 86,661.40
  4. Step 4: Simplify right side
    112,030.60x = 14,563,092,958.26
  5. Step 5: Solve for x
    x = 14,563,092,958.26/112,030.60
  6. Step 6: Final answer
    x = 129,992.10

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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.