Home / 153,413.12-211,707.60-86,345.12

Finding the Fourth Proportional to 153,413.12, 211,707.60 and 86,345.12

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Solution

The fourth proportional to 153,413.12, 211,707.60 and 86,345.12 is: 119,154.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,413.12 : 211,707.60 = 86,345.12 : x
  2. Step 2: Convert to fraction form
    153,413.12/211,707.60 = 86,345.12/x
  3. Step 3: Cross multiply
    153,413.12x = 211,707.60 × 86,345.12
  4. Step 4: Simplify right side
    153,413.12x = 18,279,918,126.91
  5. Step 5: Solve for x
    x = 18,279,918,126.91/153,413.12
  6. Step 6: Final answer
    x = 119,154.86

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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.