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Finding the Fourth Proportional to 153,513.61, 211,864.35 and 85,541.65

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Solution

The fourth proportional to 153,513.61, 211,864.35 and 85,541.65 is: 118,056.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,513.61 : 211,864.35 = 85,541.65 : x
  2. Step 2: Convert to fraction form
    153,513.61/211,864.35 = 85,541.65/x
  3. Step 3: Cross multiply
    153,513.61x = 211,864.35 × 85,541.65
  4. Step 4: Simplify right side
    153,513.61x = 18,123,226,075.18
  5. Step 5: Solve for x
    x = 18,123,226,075.18/153,513.61
  6. Step 6: Final answer
    x = 118,056.15

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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.