Home / 85,549,461.40-128,308,445.70-53,143,370.20

Finding the Fourth Proportional to 85,549,461.40, 128,308,445.70 and 53,143,370.20

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Solution

The fourth proportional to 85,549,461.40, 128,308,445.70 and 53,143,370.20 is: 79,705,273.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,549,461.40 : 128,308,445.70 = 53,143,370.20 : x
  2. Step 2: Convert to fraction form
    85,549,461.40/128,308,445.70 = 53,143,370.20/x
  3. Step 3: Cross multiply
    85,549,461.40x = 128,308,445.70 × 53,143,370.20
  4. Step 4: Simplify right side
    85,549,461.40x = 6,818,743,229,621,699
  5. Step 5: Solve for x
    x = 6,818,743,229,621,699/85,549,461.40
  6. Step 6: Final answer
    x = 79,705,273.63

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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.