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Finding the Fourth Proportional to 85,957.32, 128,347.71 and 77,014.92

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Solution

The fourth proportional to 85,957.32, 128,347.71 and 77,014.92 is: 114,995.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,957.32 : 128,347.71 = 77,014.92 : x
  2. Step 2: Convert to fraction form
    85,957.32/128,347.71 = 77,014.92/x
  3. Step 3: Cross multiply
    85,957.32x = 128,347.71 × 77,014.92
  4. Step 4: Simplify right side
    85,957.32x = 9,884,688,617.83
  5. Step 5: Solve for x
    x = 9,884,688,617.83/85,957.32
  6. Step 6: Final answer
    x = 114,995.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.