Home / 76,549.12-105,639.60-42,558.64

Finding the Fourth Proportional to 76,549.12, 105,639.60 and 42,558.64

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Solution

The fourth proportional to 76,549.12, 105,639.60 and 42,558.64 is: 58,731.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,549.12 : 105,639.60 = 42,558.64 : x
  2. Step 2: Convert to fraction form
    76,549.12/105,639.60 = 42,558.64/x
  3. Step 3: Cross multiply
    76,549.12x = 105,639.60 × 42,558.64
  4. Step 4: Simplify right side
    76,549.12x = 4,495,877,706.14
  5. Step 5: Solve for x
    x = 4,495,877,706.14/76,549.12
  6. Step 6: Final answer
    x = 58,731.93

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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.