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Finding the Fourth Proportional to 78,630.60, 108,510.93 and 42,820.77

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Solution

The fourth proportional to 78,630.60, 108,510.93 and 42,820.77 is: 59,093.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,630.60 : 108,510.93 = 42,820.77 : x
  2. Step 2: Convert to fraction form
    78,630.60/108,510.93 = 42,820.77/x
  3. Step 3: Cross multiply
    78,630.60x = 108,510.93 × 42,820.77
  4. Step 4: Simplify right side
    78,630.60x = 4,646,521,576.02
  5. Step 5: Solve for x
    x = 4,646,521,576.02/78,630.60
  6. Step 6: Final answer
    x = 59,093.04

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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.