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Finding the Fourth Proportional to 98,780.40, 148,235.40 and 56,660.40

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Solution

The fourth proportional to 98,780.40, 148,235.40 and 56,660.40 is: 85,027.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,780.40 : 148,235.40 = 56,660.40 : x
  2. Step 2: Convert to fraction form
    98,780.40/148,235.40 = 56,660.40/x
  3. Step 3: Cross multiply
    98,780.40x = 148,235.40 × 56,660.40
  4. Step 4: Simplify right side
    98,780.40x = 8,399,077,058.16
  5. Step 5: Solve for x
    x = 8,399,077,058.16/98,780.40
  6. Step 6: Final answer
    x = 85,027.77

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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.