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Finding the Fourth Proportional to 156,488.76, 215,952.98 and 84,870.36

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Solution

The fourth proportional to 156,488.76, 215,952.98 and 84,870.36 is: 117,120.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,488.76 : 215,952.98 = 84,870.36 : x
  2. Step 2: Convert to fraction form
    156,488.76/215,952.98 = 84,870.36/x
  3. Step 3: Cross multiply
    156,488.76x = 215,952.98 × 84,870.36
  4. Step 4: Simplify right side
    156,488.76x = 18,328,007,155.67
  5. Step 5: Solve for x
    x = 18,328,007,155.67/156,488.76
  6. Step 6: Final answer
    x = 117,120.28

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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.