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Finding the Fourth Proportional to 210,947.70, 316,421.55 and 70,710.90

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Solution

The fourth proportional to 210,947.70, 316,421.55 and 70,710.90 is: 106,066.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,947.70 : 316,421.55 = 70,710.90 : x
  2. Step 2: Convert to fraction form
    210,947.70/316,421.55 = 70,710.90/x
  3. Step 3: Cross multiply
    210,947.70x = 316,421.55 × 70,710.90
  4. Step 4: Simplify right side
    210,947.70x = 22,374,452,579.90
  5. Step 5: Solve for x
    x = 22,374,452,579.90/210,947.70
  6. Step 6: Final answer
    x = 106,066.35

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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.