Home / 78,685.66-108,586.23-42,875.68

Finding the Fourth Proportional to 78,685.66, 108,586.23 and 42,875.68

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Solution

The fourth proportional to 78,685.66, 108,586.23 and 42,875.68 is: 59,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,685.66 : 108,586.23 = 42,875.68 : x
  2. Step 2: Convert to fraction form
    78,685.66/108,586.23 = 42,875.68/x
  3. Step 3: Cross multiply
    78,685.66x = 108,586.23 × 42,875.68
  4. Step 4: Simplify right side
    78,685.66x = 4,655,708,449.89
  5. Step 5: Solve for x
    x = 4,655,708,449.89/78,685.66
  6. Step 6: Final answer
    x = 59,168.45

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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.