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Finding the Fourth Proportional to 113,790.61, 156,774.65 and 79,302.84

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Solution

The fourth proportional to 113,790.61, 156,774.65 and 79,302.84 is: 109,259.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,790.61 : 156,774.65 = 79,302.84 : x
  2. Step 2: Convert to fraction form
    113,790.61/156,774.65 = 79,302.84/x
  3. Step 3: Cross multiply
    113,790.61x = 156,774.65 × 79,302.84
  4. Step 4: Simplify right side
    113,790.61x = 12,432,674,985.01
  5. Step 5: Solve for x
    x = 12,432,674,985.01/113,790.61
  6. Step 6: Final answer
    x = 109,259.23

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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.