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Finding the Fourth Proportional to 70,970.48, 106,437.56 and 21,038.91

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Solution

The fourth proportional to 70,970.48, 106,437.56 and 21,038.91 is: 31,552.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,970.48 : 106,437.56 = 21,038.91 : x
  2. Step 2: Convert to fraction form
    70,970.48/106,437.56 = 21,038.91/x
  3. Step 3: Cross multiply
    70,970.48x = 106,437.56 × 21,038.91
  4. Step 4: Simplify right side
    70,970.48x = 2,239,330,245.46
  5. Step 5: Solve for x
    x = 2,239,330,245.46/70,970.48
  6. Step 6: Final answer
    x = 31,552.98

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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.