Home / 78,795.28-108,737.44-42,985.21

Finding the Fourth Proportional to 78,795.28, 108,737.44 and 42,985.21

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Solution

The fourth proportional to 78,795.28, 108,737.44 and 42,985.21 is: 59,319.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,795.28 : 108,737.44 = 42,985.21 : x
  2. Step 2: Convert to fraction form
    78,795.28/108,737.44 = 42,985.21/x
  3. Step 3: Cross multiply
    78,795.28x = 108,737.44 × 42,985.21
  4. Step 4: Simplify right side
    78,795.28x = 4,674,101,693.26
  5. Step 5: Solve for x
    x = 4,674,101,693.26/78,795.28
  6. Step 6: Final answer
    x = 59,319.56

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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.