Home / 153,686.61-212,088.45-85,707.87

Finding the Fourth Proportional to 153,686.61, 212,088.45 and 85,707.87

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Solution

The fourth proportional to 153,686.61, 212,088.45 and 85,707.87 is: 118,277.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,686.61 : 212,088.45 = 85,707.87 : x
  2. Step 2: Convert to fraction form
    153,686.61/212,088.45 = 85,707.87/x
  3. Step 3: Cross multiply
    153,686.61x = 212,088.45 × 85,707.87
  4. Step 4: Simplify right side
    153,686.61x = 18,177,649,301.10
  5. Step 5: Solve for x
    x = 18,177,649,301.10/153,686.61
  6. Step 6: Final answer
    x = 118,277.38

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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.