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Finding the Fourth Proportional to 156,700.90, 235,051.35 and 90,345.70

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Solution

The fourth proportional to 156,700.90, 235,051.35 and 90,345.70 is: 135,518.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,700.90 : 235,051.35 = 90,345.70 : x
  2. Step 2: Convert to fraction form
    156,700.90/235,051.35 = 90,345.70/x
  3. Step 3: Cross multiply
    156,700.90x = 235,051.35 × 90,345.70
  4. Step 4: Simplify right side
    156,700.90x = 21,235,878,751.70
  5. Step 5: Solve for x
    x = 21,235,878,751.70/156,700.90
  6. Step 6: Final answer
    x = 135,518.55

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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.