Home / 145,526.40-218,143.80-66,697.20

Finding the Fourth Proportional to 145,526.40, 218,143.80 and 66,697.20

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Solution

The fourth proportional to 145,526.40, 218,143.80 and 66,697.20 is: 99,978.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,526.40 : 218,143.80 = 66,697.20 : x
  2. Step 2: Convert to fraction form
    145,526.40/218,143.80 = 66,697.20/x
  3. Step 3: Cross multiply
    145,526.40x = 218,143.80 × 66,697.20
  4. Step 4: Simplify right side
    145,526.40x = 14,549,580,657.36
  5. Step 5: Solve for x
    x = 14,549,580,657.36/145,526.40
  6. Step 6: Final answer
    x = 99,978.98

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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.