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Finding the Fourth Proportional to 91,725.60, 137,458.80 and 56,560.80

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Solution

The fourth proportional to 91,725.60, 137,458.80 and 56,560.80 is: 84,761.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,725.60 : 137,458.80 = 56,560.80 : x
  2. Step 2: Convert to fraction form
    91,725.60/137,458.80 = 56,560.80/x
  3. Step 3: Cross multiply
    91,725.60x = 137,458.80 × 56,560.80
  4. Step 4: Simplify right side
    91,725.60x = 7,774,779,695.04
  5. Step 5: Solve for x
    x = 7,774,779,695.04/91,725.60
  6. Step 6: Final answer
    x = 84,761.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.