Home / 78,419.04-108,220.28-42,611.12

Finding the Fourth Proportional to 78,419.04, 108,220.28 and 42,611.12

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Solution

The fourth proportional to 78,419.04, 108,220.28 and 42,611.12 is: 58,804.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,419.04 : 108,220.28 = 42,611.12 : x
  2. Step 2: Convert to fraction form
    78,419.04/108,220.28 = 42,611.12/x
  3. Step 3: Cross multiply
    78,419.04x = 108,220.28 × 42,611.12
  4. Step 4: Simplify right side
    78,419.04x = 4,611,387,337.51
  5. Step 5: Solve for x
    x = 4,611,387,337.51/78,419.04
  6. Step 6: Final answer
    x = 58,804.43

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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.